{"id":341,"date":"2021-01-18T00:24:52","date_gmt":"2021-01-18T05:24:52","guid":{"rendered":"http:\/\/research.phys.cmu.edu\/physdemos\/?page_id=341"},"modified":"2021-01-20T20:53:13","modified_gmt":"2021-01-21T01:53:13","slug":"blocked-pendulum","status":"publish","type":"page","link":"https:\/\/research.phys.cmu.edu\/physdemos\/home\/blocked-pendulum\/","title":{"rendered":"Blocked Pendulum"},"content":{"rendered":"<div class=\"et_d4_element et_pb_section et_pb_section_0  et_pb_css_mix_blend_mode et_section_regular et_block_section\" >\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_d4_element et_pb_row et_pb_row_0  et_pb_css_mix_blend_mode et_block_row\">\n\t\t\t\t<div class=\"et_d4_element et_pb_column_1_3 et_pb_column et_pb_column_0  et_pb_css_mix_blend_mode et_block_column\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_module et_d4_element et_pb_accordion et_pb_accordion_0\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_toggle et_pb_module et_d4_element et_pb_accordion_item et_pb_accordion_item_0  et_pb_toggle_open\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<h3 class=\"et_pb_toggle_title\">TEST KEEP CLOSED<\/h3>\n\t\t\t\t<div class=\"et_pb_toggle_content clearfix\"><\/div>\n\t\t\t<\/div><div class=\"et_pb_toggle et_pb_module et_d4_element et_pb_accordion_item et_pb_accordion_item_1  et_pb_toggle_close\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<h3 class=\"et_pb_toggle_title\">MECHANICS<\/h3>\n\t\t\t\t<div class=\"et_pb_toggle_content clearfix\"><p><strong>Mechanics<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/the-monkey-and-the-hunter\/\">The Monkey and The Hunter<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/simultaneously-shoot-and-drop-a-pair-of-spheres\/\">Simultaneously Shoot and Drop Pair of Spheres<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/projectile-launched-vertically-from-a-moving-cart\/\">Projectile Launched Vertically from a Moving Cart<\/a><\/li>\n<\/ul>\n<p><strong>Newt's Laws of Motion<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/newtons-1st-law-on-an-air-track\/\">Newton's First Law<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/newtons-2nd-law-on-an-air-track\/\">Newton's Second Law<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/newtons-3rd-law-water-rocket\/\">Newton's Third Law<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/blackboard-mechanics-kit\/\">Blackboard Mechanics Kit<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/cork-bob-accelerometer\/\">Cork Bob Accelerometer<\/a><\/li>\n<\/ul>\n<p><strong>Work and Energy<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/the-bowling-ball-pendulum\/\">Bowling Ball Pendulum<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/blocked-pendulum\/\">Blocked Pendulum<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/loop-the-loop\/\">Loop-The-Loop<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/coefficients-of-friction\/\">Coefficients of Friction<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/friction-cart\/\">Friction Cart<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/energy-stored-in-a-spring\/\">Energy Stored in a Spring<\/a><\/li>\n<\/ul>\n<p><strong>Mechanical Equilibrium<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/center-of-gravity\/\">Assorted Center of Gravity Demos<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/catenary-bi-stable-equilibrium\/\">Catenary: Bi-Stable Equilibrium<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/mass-on-spring-hookes-law\/\">Mass on Spring: Hooke's Law<\/a><\/li>\n<\/ul>\n<p><strong>Collisions and Conservation of Momentum<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/explosions\/\">Explosions<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/totally-inelastic-collisions\/\">Totally Inelastic Collisions<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/elastic-collisions\/\">Elastic Collisions<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/newtons-cradle\/\">Newton's Collision Apparatus<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/internal-degrees-of-freedom-during-collisions\/\">Internal Degrees of Freedom<\/a><\/li>\n<\/ul>\n<p><strong>Circular Motion<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/balls-in-rotating-cups\/\">Balls in Rotating Cups<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/loop-the-loop\/\">Loop-the-Loop<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/swinging-water-bucket\/\">Elastic Collisions<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/swinging-water-bucket\/\">Swinging Water Bucket Overhead<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/conical-pendulum\/\">Conical Pendulum<\/a><\/li>\n<\/ul>\n<p><strong>Rigid Body Rotations<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/assortment-of-rolling-things\/\">Assortment of Rolling Things<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/moment-of-inertia-of-a-solid-disk\/\">Moment of Inertia of a Solid Disk<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/a-windlass-with-variable-moment-of-inertia\/\">Windlass with Variable Moment of Inertia<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/demonstrator-on-a-rotating-stool-with-dumbbells\/\">Rotating Stool with Dumbbells<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/demonstrator-on-a-rotating-stool-with-weighted-bicycle-wheel\/\">Rotating Stool with a Bicycle Wheel<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/gyroscopes\/\">Gyroscopes<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/rotating-reference-frame\/\">Rotating Reference Frame<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/parallel-and-non-parallel-angular-velocity-and-momentum\/\">Parallel and Non-Parallel Angular Velocity and Momentum<\/a><\/li>\n<\/ul><\/div>\n\t\t\t<\/div><div class=\"et_pb_toggle et_pb_module et_d4_element et_pb_accordion_item et_pb_accordion_item_2  et_pb_toggle_close\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<h3 class=\"et_pb_toggle_title\">OSCILLATIONS AND WAVES<\/h3>\n\t\t\t\t<div class=\"et_pb_toggle_content clearfix\"><p><strong>Periodic Motion<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/assorted-oscillating-things\/\">Oscillating Things<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/simple-mass-spring-system\/\">Simple Mass-Spring System<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/damped-harmonic-motion\/\">Damped Harmonic Motion<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/simple-pendulum\/\">Simple Pendulum<\/a><\/li>\n<\/ul>\n<p><strong>Driven Oscillations and Resonance Phenomena<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/driven-damped-harmonic-motion\/\">Driven, Damped Harmonic Oscillator<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/resonance-with-a-speaker-and-adjustable-pipe\/\">Resonance with a Speaker and Adjustable Pipe<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/driven-pendulum-parametric-resonance\/\">Driven Pendulum<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/modes-of-vibration\/\">Modes of Vibration<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/pair-of-compound-pendulums-chaos\/\">Compound Pendulum<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/chaotic-oscillations-magnetic-pendulum\/\">Chaotic Oscillations<\/a><\/li>\n<\/ul>\n<p><strong>Propagation of Mechanical Waves<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/transverse-pulses-on-a-long-rubber-tube\/\">Transverse Pulses<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/longitudinal-pulses-on-a-slinky\/\">Longitudinal Pulses<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/reflection-transmission-at-a-boundary\/\">Reflection or Transmission at a Boundary<\/a><\/li>\n<\/ul>\n<p><strong>Superposition of Waves<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/transverse-standing-waves-on-a-long-coil-spring\/\">Transverse Standing Waves<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/torsional-standing-waves\/\">Torsional Standing Waves<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/longitudinal-standing-waves\/\">Longitudinal Standing Waves<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/fourier-synthesizer\/\">Fourier Synthesizer<\/a><\/li>\n<\/ul>\n<p><strong>Normal Modes of Vibration<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/normal-modes-in-one-dimension\/\">One dimension<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/normal-modes-of-a-plucked-string\/\">A Plucked String<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/normal-modes-of-a-driven-vibrating-string\/\">A Driven Vibrating String<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/weakly-coupled-pendulums\/\">Weakly Coupled Pendulums<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/compound-pendulum\/\">Compound Pendulum<\/a><\/li>\n<\/ul>\n<p><strong>Acoustic Phenomena<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/doppler-effect\/\">Doppler Effect<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/beat-frequencies\/\">Beat Frequencies<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/interference-of-sound-waves\/\">Interference of Sound Waves<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/sympathetic-vibrations-in-tuning-bars\/\">Sympathetic Vibrations in Tuning Bars<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/speed-of-sound-in-air-and-in-helium\/\">Speed of Sound in Air and Helium<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/speed-of-sound-in-a-metal-bar\/\">Speed of Sound in a Metal<\/a><\/li>\n<\/ul><\/div>\n\t\t\t<\/div><div class=\"et_pb_toggle et_pb_module et_d4_element et_pb_accordion_item et_pb_accordion_item_3  et_pb_toggle_close\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<h3 class=\"et_pb_toggle_title\">OPTICS<\/h3>\n\t\t\t\t<div class=\"et_pb_toggle_content clearfix\"><p><strong>Geometrical Optics<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/blackboard-optics-kit-reflection-refraction\/\">Blackboard Optics Kit<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/dispersion-in-a-prism\/\">Dispersion in a Prism<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/total-internal-reflection\/\">Total Internal Reflection<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/fiber-optic-cables\/\">Fiber Optic Cables<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/speed-of-light-from-electrical-pulses\/\">Speed of Light<\/a><\/li>\n<\/ul>\n<p><strong>Interference and Diffraction<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/single-slit-diffraction\/\">Single Slit<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/double-slit-diffraction\/\">Double Slit<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/multiple-slits-and-gratings\/\">Multiple Slits and Gratings<\/a><\/li>\n<li>Thin Film Interference:<\/li>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/wedged-optical-flats\/\">Wedged Optical Flats<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/thin-film-interference-soap-bubbles\/\">Soap Bubbles<\/a><\/li>\n<\/ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/thin-film-interference-newtons-rings\/\">Newton's Rings<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/circular-obstacle-diffraction-poissons-spot\/\">Poisson's Spot<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/michelson-interferometer\/\">Michelson Interferometer<\/a><\/li>\n<\/ul>\n<p><strong>Polarization<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/polarization-by-transmission\/\">By Transmission<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/polarization-by-reflection\/\">By Reflection<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/polarization-of-scattered-light\/\">Scattered Light<\/a><\/li>\n<\/ul><\/div>\n\t\t\t<\/div><div class=\"et_pb_toggle et_pb_module et_d4_element et_pb_accordion_item et_pb_accordion_item_4  et_pb_toggle_close\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<h3 class=\"et_pb_toggle_title\">THERMAL PROPERTIES OF MATTER<\/h3>\n\t\t\t\t<div class=\"et_pb_toggle_content clearfix\"><p><strong>Thermal Expansion<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/thermal-expansion-of-a-brass-tube\/\">Expansion of Brass Tube<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/differential-expansion-bi-metallic-strip-thermostat\/\">Bi-Metallic Thermostat<\/a><\/li>\n<\/ul>\n<p><strong>Thermal Conductivity<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/conduction-of-heat-through-dissimilar-metals\/\">Dissimilar Metals<\/a><\/li>\n<\/ul><\/div>\n\t\t\t<\/div><div class=\"et_pb_toggle et_pb_module et_d4_element et_pb_accordion_item et_pb_accordion_item_5  et_pb_toggle_close\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<h3 class=\"et_pb_toggle_title\">THERMODYNAMICS<\/h3>\n\t\t\t\t<div class=\"et_pb_toggle_content clearfix\"><h4>Pressure-Volume-Temperature Relationships<\/h4>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/adiabatic-gas-law\/\">Adiabatic Gas Law<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/pressure-differences\/\">Pressure Differences<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/balloon-in-evacuated-bell-jar-model-lung\/\">Model Lung<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/boyles-law-apparatus\/\">Boyle's Law<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/volume-and-temperature-at-constant-pressure\/\">V-T Relationship at Constant Pressure<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/p-v-t-surface-for-water\/\">P-V-T Surface for Water<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/diffusion-through-an-aperature\/\">Diffusion Through an Aperture<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/p-t-relation-at-constant-volume\/\">P-T Relation at Constant Volume<\/a><\/li>\n<\/ul>\n<h4>Many Particle Systems<\/h4>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/equipartition-of-energy-in-a-mixed-gas\/\">Equipartition of Energy in a Mixed Gas<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/kinetic-theory-and-diffusion-balls-in-an-aspirator-jar\/\">Kinetic Theory &amp; Diffusion<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/brownian-motion-simulation\/\">Brownian Motion Simulation<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/solid-liquid-gas-transitions\/\">Solid-Liquid-Gas Transitions<\/a><\/li>\n<li>Heat Engines:<\/li>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/heat-engine-drinking-bird\/\">Drinking Bird<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/stirling-cycle-heat-engine\/\">Stirling Cycle<\/a><\/li>\n<\/ul>\n<\/ul><\/div>\n\t\t\t<\/div><div class=\"et_pb_toggle et_pb_module et_d4_element et_pb_accordion_item et_pb_accordion_item_6  et_pb_toggle_close\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<h3 class=\"et_pb_toggle_title\">ELECTRICITY &amp; MAGNETISM <\/h3>\n\t\t\t\t<div class=\"et_pb_toggle_content clearfix\"><h4>Electric Charge and Field<\/h4>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/positive-and-negative-charge-by-friction\/\">Positive and Negative Charge by Friction<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/induced-surface-charge-on-conductors\/\">Induced Surface Charge on Conductors<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/coulombs-law-apparatus\/\">Coulomb's Law<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/distribution-of-surface-charge-on-conductors\/\">Distribution of Surface Charge on Conductors<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/capacitors-and-energy-storage\/\">Capacitors and Energy Storage<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/capacitor-voltage-vs-plate-separation-and-dielectric-constant\/\">Capacitance vs. Plate Separation<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/electric-sparks-and-ionization-effects\/\">Van de Graaff<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/jacobs-ladder\/\">Jacob's Ladder<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/electric-field-lines\/\">Electric Field Lines<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/force-on-a-moving-charge-in-an-electric-field\/\">Force on a Moving Charge in an Electric Field<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/flux-surface-and-volume\/\">Flux Surface and Volume<\/a><\/li>\n<\/ul>\n<h4>Current and Resistance<\/h4>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/resistors-in-series-and-parallel\/\">Resistors in Series and Parallel<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/internal-resistance-of-a-battery\/\">Internal Resistance of a Battery<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/ohmic-and-non-ohmic-devices\/\">Ohmic and Non-Ohmic Devices<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/drift-velocity\/\">Drift Velocity Demonstrator<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/the-wire-fryer-dc-version\/\">Wire Fryer (DC version)<\/a><\/li>\n<\/ul>\n<h4>Magnetic Field and Forces on Currents<\/h4>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/magnetic-domain-model\/\">Magnetic Domain Model<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/magnetic-field-of-a-permanent-magnet\/\">Magnetic Field of Permanent Magnets<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/earths-magnetic-field-dip-needle\/\">Earth's Magnetic Field: Dip Needle<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/magnetic-field-of-a-current-carrying-wire\/\">Magnetic Field of Currents<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/magnetic-field-inside-a-solenoid\/\">Magnetic Field of a Solenoid<\/a><\/li>\n<li>Magnetic Force on an Electron Beam:<\/li>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/magnetic-force-on-an-electron-beam-e-m-experiment\/\">e\/m Experiment<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/magnetic-force-on-an-electron-beam-circular-orbit\/\">Circular Orbit<\/a><\/li>\n<\/ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/magnetic-force-on-a-current-carrying-wire\/\">Magnetic Force on a Current-Carrying Wire<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/magnetic-torque-on-a-current-loop\/\">Magnetic Torque on a Current Loop<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/force-between-two-current-carrying-wires\/\">Force Between Current-Carrying Wires<\/a><\/li>\n<\/ul>\n<h4>Induced Currents and EMF<\/h4>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/faradays-law-and-lenzs-law\/\">Faraday's Law and Lenz's Law<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/enclosed-fields-and-magnetic-induction\/\">Enclosed Fields and Magnetic Induction<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/current-generators\/\">Current Generators<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/dc-motor\/\">DC Motors<\/a><\/li>\n<li>Eddy Currents:<\/li>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/eddy-current-pendulum\/\">Pendulum<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/eddy-current-pipe\/\">Aluminum Pipe<\/a><\/li>\n<\/ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/jumping-rings\/\">Jumping Rings<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/the-wire-fryer-ac-version\/\">Wire Fryer AC<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/transformers-and-flux-linkage\/\">Transformers and Flux Linkage<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/self-inductance-and-energy-storage\/\">Self-Inductance and Energy Storage<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/displacement-current\/\">Displacement Current<\/a><\/li>\n<\/ul>\n<h4>Time Dependent Currents<\/h4>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/rc-time-constants\/\">RC Time Constants<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/rlc-oscillations-and-energy-dissipation\/\">RLC Oscillations and Energy Dissipation<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/resonance-in-a-driven-rlc-circuit\/\">Resonance in a Driven RLC Circuit<\/a><\/li>\n<\/ul>\n<h4>Superconductivity<\/h4>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/resistivity-vs-temperature-for-a-superconductor\/\">Resistivity vs. Temperature<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/meissner-effect-and-magnetic-levitation\/\">Meissner Effect<\/a><\/li>\n<\/ul>\n<h4>Electromagnetic Waves<\/h4>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/dipole-radiator-short-wave-radio\/\">Dipole Radiator<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/two-source-microwave-interference\/\">Two-Source Microwave Interference<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/standing-microwave-pattern\/\">Standing Microwave Pattern<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/microwave-wave-guides\/\">Microwave Guides<\/a><\/li>\n<\/ul><\/div>\n\t\t\t<\/div><div class=\"et_pb_toggle et_pb_module et_d4_element et_pb_accordion_item et_pb_accordion_item_7  et_pb_toggle_close\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<h3 class=\"et_pb_toggle_title\">ATOMIC AND NUCLEAR PROCESSES <\/h3>\n\t\t\t\t<div class=\"et_pb_toggle_content clearfix\"><h4>Quantum Physics<\/h4>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/photoelectric-effect\/\">Photoelectric Effect<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/atomic-and-molecular-spectra-direct-viewing\/\">Atomic and Molecular Spectra<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/electron-diffraction\/\">Electron Diffraction<\/a><\/li>\n<\/ul>\n<h4>Nuclear and Particle Physics<\/h4>\n<ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/background-radiation-cosmic-ray-muons\/\">Background Radiation<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/ceramic-dinnerware-with-uranium-glaze\/\">Ceramic Dinnerware with Uranium Glaze<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/half-life-of-indium-116\/\">Half-Life of Indium 116<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/gamma-ray-spectroscopy\/\">Gamma Ray Spectroscopy<\/a><\/li>\n<\/ul><\/div>\n\t\t\t<\/div><div class=\"et_pb_toggle et_pb_module et_d4_element et_pb_accordion_item et_pb_accordion_item_8  et_pb_toggle_close\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<h3 class=\"et_pb_toggle_title\">VISUAL AIDS<\/h3>\n\t\t\t\t<div class=\"et_pb_toggle_content clearfix\"><ul>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/visual-aids-resources\/\">Resources<\/a><\/li>\n<li><a href=\"https:\/\/research.phys.cmu.edu\/physdemos\/home\/visual-aids-resources\/#projector\">Computer &amp; Projector<\/a><\/li>\n<\/ul><\/div>\n\t\t\t<\/div>\n\t\t\t<\/div><div class=\"et_pb_button_module_wrapper et_pb_button_0_wrapper et_pb_button_alignment_center et_pb_module \">\n\t\t\t\t<a class=\"et_pb_button et_d4_element et_pb_button_0 et_pb_bg_layout_light et_block_module\" href=\"https:\/\/research.phys.cmu.edu\/physdemos\/demonstration-request\/\">Request A Demonstration<\/a>\n\t\t\t<\/div>\n\t\t\t<\/div><div class=\"et_d4_element et_pb_column_2_3 et_pb_column et_pb_column_1  et_pb_css_mix_blend_mode et-last-child et_block_column\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_module et_d4_element et_pb_text et_pb_text_0  et_pb_text_align_left et_pb_bg_layout_light\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_text_inner\"><h1>Blocked Pendulum<\/h1>\n<p>A freely swinging pendulum is blocked by a horizontal peg, making the length of the pendulum shorter for part of its trajectory.<\/div>\n\t\t\t<\/div><div class=\"et_pb_module et_d4_element et_pb_image et_pb_image_0\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<span class=\"et_pb_image_wrap \"><img loading=\"lazy\" decoding=\"async\" width=\"335\" height=\"359\" src=\"http:\/\/research.phys.cmu.edu\/physdemos\/wp-content\/uploads\/sites\/4\/2021\/01\/blockedpendulum2.jpg\" alt=\"Blocked Pendulum\" title=\"Blocked Pendulum\" srcset=\"https:\/\/research.phys.cmu.edu\/physdemos\/wp-content\/uploads\/sites\/4\/2021\/01\/blockedpendulum2.jpg 335w, https:\/\/research.phys.cmu.edu\/physdemos\/wp-content\/uploads\/sites\/4\/2021\/01\/blockedpendulum2-280x300.jpg 280w\" sizes=\"(max-width: 335px) 100vw, 335px\" class=\"wp-image-115\" \/><\/span>\n\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":4,"featured_media":0,"parent":7,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-341","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/research.phys.cmu.edu\/physdemos\/wp-json\/wp\/v2\/pages\/341","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/research.phys.cmu.edu\/physdemos\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/research.phys.cmu.edu\/physdemos\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/research.phys.cmu.edu\/physdemos\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/research.phys.cmu.edu\/physdemos\/wp-json\/wp\/v2\/comments?post=341"}],"version-history":[{"count":4,"href":"https:\/\/research.phys.cmu.edu\/physdemos\/wp-json\/wp\/v2\/pages\/341\/revisions"}],"predecessor-version":[{"id":1189,"href":"https:\/\/research.phys.cmu.edu\/physdemos\/wp-json\/wp\/v2\/pages\/341\/revisions\/1189"}],"up":[{"embeddable":true,"href":"https:\/\/research.phys.cmu.edu\/physdemos\/wp-json\/wp\/v2\/pages\/7"}],"wp:attachment":[{"href":"https:\/\/research.phys.cmu.edu\/physdemos\/wp-json\/wp\/v2\/media?parent=341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}