PIRA 3A15.00 PHYSICAL PENDULA

DCS #DEMONSTRATIONREFERENCEABSTRACT
3A15.00Physical Pendula
3A15.10physical pendulumPIRA 200Any distributed mass pendulum.
3A15.10physical pendulum setAJP 48(6),487A reconstruction of a nineteenth-century physical pendulum set of four shapes of equal length mounted from a common bar.
3A15.10other symmetrical shaped pendulaTPT 28(1),51Twenty various physical pendula and are shown.
3A15.12balancing man physical pendulumAJP 55(1),84The balancing man usually used to show stable equilibrium is used here as a physical pendulum.
3A15.13rocking stick15-5.2A meter stick with small masses at the ends rocks on a large radius cylinder. Derivation.
3A15.20oscillating barPIRA 500
3A15.20oscillation bar3A15.20A bar is suspended from pivots at 1/6 and 1/4 of its length. A companion simple pendulum is used for comparison.
3A15.20oscillating barTPT 17(1),52Analysis of the oscillating bar with a graph of typical data.
3A15.20oscillating barTPT 12(8),494Analysis of the oscillating bar includes suspending the bar from a string.
3A15.20oscillating barM-203Suspend the meter stick from one end and find the center of oscillation with a simple pendulum of the same period.
3A15.20physical pendulumDisc 08-18Compare the period of a bar supported at the end with a simple pendulum of 2/3 length.
3A15.21two rods and a ballM-14dA rod pivots at a point 2/3 l, a second rod 2/3 l pivots at the end, and a simple pendulum has length 2/3 l. Then pivot the long rod from the end and compare periods.
3A15.25oscillating hoopPIRA 500
3A15.25oscillating hoop3A15.25A hoop and pendulum oscillate from the same point.
3A15.25oscillating hoopMy-3Adjust a simple pendulum to give the same period as a hoop.
3A15.30paddle oscillatorPIRA 1000
3A15.30paddle3A15.30A physical pendulum that oscillates with the same frequency from any of a series of holes.
3A15.30paddleMy-1An odd shaped object oscillates from conjugate points that give the physical pendulum equal periods.
3A15.31triangle oscillator12-3.8Suspend a meter stick four different ways with the same period of oscillation. Holes are drilled on two concentric circles about the center of mass of a large triangle such that the period of oscillation is always the same.
3A15.35bent wireMy-8Measure the period of a two corks on a bent wire physical pendulum with the wire bent to various angles.
3A15.40truncated ringPIRA 500
3A15.40truncated ring3A15.40Same as AJP 35(10),971.
3A15.40truncated ringAJP 35(10),971Removing any part of the hoop will not change the period.
3A15.40hoops and arcsDisc 08-16A hoop oscillates with the same period as arcs corresponding to parts of the hoop.
3A15.45oscillating laminaPIRA 1000
3A15.45oscillating lamina3A15.45Same as TPT 4(2), 78. But where is the reference?
3A15.50sweet spotPIRA 500
3A15.50sweet spot3A15.50A baseball bat on a frame is rigged to show the motion of the handle end when the bat is hit on and off the center of percussion.
3A15.50center of percussionAJP 44(8),789Hang a rod from a thin steel rod that acts as both a support and a pivot. A styrofoam ball on the thin rod is an indicator of the motion of the end of the hanging rod.
3A15.50sweet spotMy-7Hit a baseball bat on a rail suspension at points on and off the center of percussion.
3A15.50center of percussionDisc 06-12Hang a long metal bar by a string from one end. Strike the bar with a mallet at various points.
3A15.52sweet spot15-6.2Fire a spring powered gun at a meter stick loosely supported on one end. The top jumps one way or the other when hit off the center of percussion.
3A15.53sweet spotM-204Strike a meter stick supported by a matchstick at its center of percussion. Repeat off the center of percussion and break the matchstick. May be scaled up.
3A15.54sweet spot15-6.1A bunch of corks sit on a meter stick on the lecture bench. Hit the stick near the end and as it moves down the table the cork at the center of percussion will remain on the stick.
3A15.55sweet spotMy-5A rectangular bar suspended by a thread along with an adjustable simple pendulum. Strike the bar.
3A15.55sweet spotM-205Strike a heavy metal bar suspended by a string at various points.
3A15.56sweet spotMy-4A rectangular bar is supported as a physical pendulum from one of two pivots along with a simple pendulum.
3A15.57sweet spot of a meter stickPIRA 1000
3A15.57sweet spot of a meter stick3A15.57
3A15.58sweet spot15-3.6A bat is suspended from a horizontal cable under tension. When struck off the center of percussion, vibrations in the cable cause a neon lamp to light.
3A15.59sweet spot analysisAJP 49(9),816The different definitions of the term "sweet spot" are discussed, each one based on a different physical phenomenon.
3A15.59analysis of the sweet spotAJP 54(7),640Analysis of the three sweet spots of the baseball bat and the location of the impact point that gives maximum power.
3A15.70Kater's pendulumPIRA 1000
3A15.70Kater's pendulumAJP 48(9),785Modification of a Welch Kater pendulum so that it may be used more systematically and with improved precision to measure the acceleration due to gravity.
3A15.70Kater's pendulumMy-2An elaborate pendulum that allows "g" to be determined accurately.
3A15.72Kater's pendulumTPT 10(8),466Analysis of: if the center of mass is halfway between the pivots, g cannot be determined from measurements of equal period alone.

ReferenceDescription
M-1Sutton
Ma-1Freier & Anderson
M-1dHilton
8-2.8Meiners
1A12.01University of Minnesota Handbook
AJP 52(1),85American Journal of Physics
TPT 15(5),300The Physics Teacher
Disc 01-01The Video Encyclopedia of Physics Demonstrations

Return to:
[WAVES AND OSCILLATIONS][MAIN BIBLIOGRAPHY]