| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 1C30.00 | Measuring g | | |
| 1C30.10 | free fall timer | PIRA 200 | A ball is timed as it drops .5m, 1m, 1.5m, or 2m. |
| 1C30.10 | free fall timer | 1C30.10 | A ball is timed as it drops .5m, 1m, 1.5m, or 2m. |
| 1C30.11 | dropping balls | 7-1.17 | A latching relay system for turning a standard timer on and off for the dropping ball experiment. Use two independent measurements to eliminate the delay factor. |
| 1C30.12 | dropping balls | 7-1.18 | Use a photo interrupt system to time a falling ball. Details in appendix to demo 10-2.18. |
| 1C30.13 | dropping balls - release | AJP 42(3),255 | A clever device to replace the standard electromagnet release for timing a dropping ball. |
| 1C30.13 | dropping balls | AJP 44(9),855 | By replacing optical position sensors with electrical contact switches and by using an integrated-circuit timer with digital readout, the time required for a ball bearing to fall may be measured consistently to about 0.1 msec. The acceleration of gravity may then be determined to better than one part per thousand. |
| 1C30.13 | accurate release mechanism | AJP 55(4),324 | A new release mechanism with 10 ms accuracy. |
| 1C30.14 | free fall timer - stopwatch mod. | AJP 59(6),568 | Modify a commercial lap timer/stopwatch. Interface circuit and construction details. |
| 1C30.15 | little big ball dropper | PIRA 1000 | |
| 1C30.15 | big ball dropper | 1C30.15 | |
| 1C30.16 | dropping balls | M-3b | A ball is released by an electromagnet and a clock started. The catcher stops the clock and can be set at different heights. |
| 1C30.17 | Welch free fall apparatus | M-87 | Describes an old Welch free fall apparatus. |
| 1C30.18 | big ball dropper | 1C30.18 | |
| 1C30.20 | big big ball dropper | PIRA 1000 | |
| 1C30.20 | tall big ball dropper | 1C30.20 | |
| 1C30.21 | dropping balls | 7-1.20 | Dropping a ball through a system of mirrors interrupts a light beam several times. Photocell output is displayed on a scope. |
| 1C30.22 | induction method | TPT 12(2),115 | Drop a magnet through several equally spaced coils of wire. Examine the induced voltage on an oscilloscope. Circuit included. |
| 1C30.25 | dropping balls in air | AJP 39(7),757 | Light and heavy balls are dropped through a multiple pass light beam and the output is shown on an oscilloscope. |
| 1C30.30 | falling slab | M-85 | A slab of wood is dropped by a ink squirter which leaves lines at equal time intervals. |
| 1C30.31 | ink jet marker | 7-1.7 | A rotating ink jet sprays a paper sleeve on a falling meter stick. |
| 1C30.33 | dropping balls - photo | Mb-18 | Take a picture of a dropping ball illuminated by a strobe. |
| 1C30.33 | dropping balls - photo | 7-1.14 | Photograph a dropping light bulb with a strobed disc. |
| falling drops | PIRA 1000 | |
| 1C30.40 | mercury drops | AJP 47(6),542 | A falling mercury drop generator and an electronic timing circuit conveniently and automatically generates a large number of data in a short period of time, yielding results with a high degree of precision. |
| 1C30.41 | falling drops | TPT 4(2),77 | A strobe illuminates water dripping from a faucet at an uniform rate. |
| 1C30.42 | falling drops | AJP 48(10),888 | A machine to make a stream of falling bubbles which are illuminated by a strobe light. |
| 1C30.43 | falling drops | 7-1.15 | Steel balls are dropped at regular intervals and illuminated with a strobe. Diagrams and pictures. |
| 1C30.44 | synchrodropper | AJP 33(10),824 | Design for a 60 Hz stable synchrodropper. |
| 1C30.46 | "videostrobe" with falling drops | TPT 28(2),108 | Use the 60 Hz refresh rate of a video monitor to strobe falling drops by adjusting the rate to 60 Hz and having the stream fall past the screen. |
| 1C30.55 | catch a meter stick | PIRA 1000 | |
| 1C30.55 | catch a meter sitck | 1C20.55 | Have one student drop a meter stick and use the distance it drops before another students catches it to determine the reaction time. |
| 1C30.55 | catch a dollar | TPT 14(3),177 | Have a student try to catch a dollar starting with the fingers at the midpoint. |
| 1C30.55 | catch a meter stick | Mb-1b | Drop a meter stick and have a student catch it. Distance can be converted to reaction time. |
| 1C30.55 | catch a meter stick | 6-2.6.2 | Drop a meter stick and have a student catch it. |
| 1C30.55 | reaction time falling meter stick | Disc 01-13 | Have a student catch a falling meter stick and relate the distance dropped to the reaction time. |
| 1C30.61 | rotating turntable | TPT 16(9),656 | Drop a ball on a phonograph turntable. Get time from the range. |
| 1C30.61 | rotating turntable | 7-1.13 | Microswitch triggers dropping ball onto rotating turntable. |
| 1C30.63 | pendulum timed free fall | M-86 | A pendulum released from the side hits a ball dropped from the height that gives a fall time equal to a quarter period of the pendulum. |
| 1C30.66 | many bounce method | AJP 55(1),59 | Time a bouncing ball for many bounces and determine g using the coefficient of restitution. |