| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 3A15.00 | Physical Pendula | | |
| 3A15.10 | physical pendulum | PIRA 200 | Any distributed mass pendulum. |
| 3A15.10 | physical pendulum set | AJP 48(6),487 | A reconstruction of a nineteenth-century physical pendulum set of four shapes of equal length mounted from a common bar. |
| 3A15.10 | other symmetrical shaped pendula | TPT 28(1),51 | Twenty various physical pendula and are shown. |
| 3A15.12 | balancing man physical pendulum | AJP 55(1),84 | The balancing man usually used to show stable equilibrium is used here as a physical pendulum. |
| 3A15.13 | rocking stick | 15-5.2 | A meter stick with small masses at the ends rocks on a large radius cylinder. Derivation. |
| 3A15.20 | oscillating bar | PIRA 500 | |
| 3A15.20 | oscillation bar | 3A15.20 | A bar is suspended from pivots at 1/6 and 1/4 of its length. A companion simple pendulum is used for comparison. |
| 3A15.20 | oscillating bar | TPT 17(1),52 | Analysis of the oscillating bar with a graph of typical data. |
| 3A15.20 | oscillating bar | TPT 12(8),494 | Analysis of the oscillating bar includes suspending the bar from a string. |
| 3A15.20 | oscillating bar | M-203 | Suspend the meter stick from one end and find the center of oscillation with a simple pendulum of the same period. |
| 3A15.20 | physical pendulum | Disc 08-18 | Compare the period of a bar supported at the end with a simple pendulum of 2/3 length. |
| 3A15.21 | two rods and a ball | M-14d | A 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. |
| 3A15.25 | oscillating hoop | PIRA 500 | |
| 3A15.25 | oscillating hoop | 3A15.25 | A hoop and pendulum oscillate from the same point. |
| 3A15.25 | oscillating hoop | My-3 | Adjust a simple pendulum to give the same period as a hoop. |
| 3A15.30 | paddle oscillator | PIRA 1000 | |
| 3A15.30 | paddle | 3A15.30 | A physical pendulum that oscillates with the same frequency from any of a series of holes. |
| 3A15.30 | paddle | My-1 | An odd shaped object oscillates from conjugate points that give the physical pendulum equal periods. |
| 3A15.31 | triangle oscillator | 12-3.8 | Suspend 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. |
| 3A15.35 | bent wire | My-8 | Measure the period of a two corks on a bent wire physical pendulum with the wire bent to various angles. |
| 3A15.40 | truncated ring | PIRA 500 | |
| 3A15.40 | truncated ring | 3A15.40 | Same as AJP 35(10),971. |
| 3A15.40 | truncated ring | AJP 35(10),971 | Removing any part of the hoop will not change the period. |
| 3A15.40 | hoops and arcs | Disc 08-16 | A hoop oscillates with the same period as arcs corresponding to parts of the hoop. |
| 3A15.45 | oscillating lamina | PIRA 1000 | |
| 3A15.45 | oscillating lamina | 3A15.45 | Same as TPT 4(2), 78. But where is the reference? |
| 3A15.50 | sweet spot | PIRA 500 | |
| 3A15.50 | sweet spot | 3A15.50 | A 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. |
| 3A15.50 | center of percussion | AJP 44(8),789 | Hang 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. |
| 3A15.50 | sweet spot | My-7 | Hit a baseball bat on a rail suspension at points on and off the center of percussion. |
| 3A15.50 | center of percussion | Disc 06-12 | Hang a long metal bar by a string from one end. Strike the bar with a mallet at various points. |
| 3A15.52 | sweet spot | 15-6.2 | Fire 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. |
| 3A15.53 | sweet spot | M-204 | Strike 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. |
| 3A15.54 | sweet spot | 15-6.1 | A 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. |
| 3A15.55 | sweet spot | My-5 | A rectangular bar suspended by a thread along with an adjustable simple pendulum. Strike the bar. |
| 3A15.55 | sweet spot | M-205 | Strike a heavy metal bar suspended by a string at various points. |
| 3A15.56 | sweet spot | My-4 | A rectangular bar is supported as a physical pendulum from one of two pivots along with a simple pendulum. |
| 3A15.57 | sweet spot of a meter stick | PIRA 1000 | |
| 3A15.57 | sweet spot of a meter stick | 3A15.57 | |
| 3A15.58 | sweet spot | 15-3.6 | A 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. |
| 3A15.59 | sweet spot analysis | AJP 49(9),816 | The different definitions of the term "sweet spot" are discussed, each one based on a different physical phenomenon. |
| 3A15.59 | analysis of the sweet spot | AJP 54(7),640 | Analysis of the three sweet spots of the baseball bat and the location of the impact point that gives maximum power. |
| 3A15.70 | Kater's pendulum | PIRA 1000 | |
| 3A15.70 | Kater's pendulum | AJP 48(9),785 | Modification of a Welch Kater pendulum so that it may be used more systematically and with improved precision to measure the acceleration due to gravity. |
| 3A15.70 | Kater's pendulum | My-2 | An elaborate pendulum that allows "g" to be determined accurately. |
| 3A15.72 | Kater's pendulum | TPT 10(8),466 | Analysis of: if the center of mass is halfway between the pivots, g cannot be determined from measurements of equal period alone. |