| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 1D50.00 | Central Forces | | |
| 1D50.10 | ball on a string | PIRA 200 | Tie a lightweight ball to a sting and twirl around in a vertical circle. |
| 1D50.10 | ball on a string | 1D50.10 | Tie a whiffle ball to a sting and twirl around in a vertical circle. |
| 1D50.15 | arrow on a disc | PIRA 1000 | |
| 1D50.15 | arrow on a disk | 1D50.15 | Mount an arrow tangentially on the edge of a rotating disk. |
| 1D50.20 | whirligig | PIRA 1000 | |
| 1D50.20 | whirligig | 1D50.20 | A large ball and a small ball fastened to opposite ends of a string which is threaded through a handle. |
| 1D50.20 | centripetal force apparatus | AJP 29(3),212 | Use a glass tube for the holder and rubber stoppers for the masses. |
| 1D50.20 | whirligig | Mm-2 | A large and small ball are on opposite sides of a string threaded through a handle. |
| 1D50.20 | whirligig | M-138 | Two balls - 1 kg, 100 g - are attached to the ends of a 1 m string passing through a small hollow tube. Twirl a ball around your head. |
| 1D50.20 | ball on cord | Disc 05-17 | A string with a rubber ball on one end passes through a plastic sleeve and weights are attached to a loop at the other end. |
| 1D50.23 | whirlygig | AJP 30(3),221 | Apparatus Drawings Project No. 25: Construction of a low friction conical pendulum. |
| 1D50.23 | whirligig | 8-5.3 | The front axle of a bike is used for a whirligig support. |
| 1D50.25 | conical pendulum | PIRA 500 | |
| 1D50.25 | conical pendulum | 1D50.25 | A ceiling mounted bowling ball pendulum is used as a conical pendulum. |
| 1D50.25 | conical pendulum | M-160 | A ball on a cord is rotated mechanically at a steady slow speed. |
| 1D50.26 | plane on a string | PIRA 1000 | |
| 1D50.26 | plane on string | Disc 05-19 | A model plane flies around on a string defining a conical pendulum. |
| 1D50.27 | conical pendulum | 8-5.9 | Motorized triple bifilar coaxial conical pendula are used to demonstrate critical period. |
| 1D50.28 | conical pendulum | AJP 31(1),58 | The main bearing of a conical pendulum is from a bicycle wheel axle. See also under whrilygig (AJP 30,221) |
| 1D50.28 | conical pendulum | M-19l | The front wheel axle of a bike is used as a good bearing for a conical pendulum where the string tension is set by a counterweight. See AJP 31(1),58. |
| 1D50.29 | conical pendulum game | TPT 1(2),81 | Swing a conical pendulum so it will strike a peg directly under the support on some swing other than the first. |
| 1D50.30 | carnival ride model | PIRA 1000 | |
| 1D50.30 | canival ride model | 1D50.30 | A toy person is held on a vertical card at the edge of a turntable when the turntable is spun fast enough. |
| 1D50.30 | roundup | Disc 05-20 | A toy person stands on the inside wall of a rotating cylinder. |
| 1D50.37 | swinging up a weight | 8-5.4 | An arrangement whereby a swinging 500 g weight picks up a 1000 g weight. |
| 1D50.40 | pail of water | PIRA 200 | Swing a bucket of water in a verticle circle over your head. |
| 1D50.40 | pail of water, pail of nails | 1D50.40 | Swing a bucket of water in a vertical circle over your head. If nails are used, they can be heard dropping away from the bottom of the can. |
| 1D50.40 | pail of water | Mb-29 | A pail of water is whirled around in a vertical circle. |
| 1D50.40 | pail of water | M-154 | Swing a bucket of water over your head. |
| 1D50.40 | whirling bucket of water | Disc 05-21 | Rotate a bucket of water in a vertical circle. |
| 1D50.45 | penny on a coat hanger | PIRA 1000 | |
| 1D50.45 | penny on a coathanger | 1D50.45 | |
| 1D50.45 | penny on the coathanger | AJP 40(5),776 | Place a penny on an elongated coat hanger and rotate around your finger. |
| 1D50.45 | penny on the coathanger | TPT 15(1),46 | A penny is balanced on the hook of a coat hanger. The coat hanger is twirled around your finger and the penny doesn't fly off. |
| 1D50.45 | penny on the coathanger | M-155 | The wire coat hanger is whirled about the vertical plane by the hook without dislodging the dime on the middle of the lower bar. |
| 1D50.45 | penny on the coathanger | M-16b.3 | Place a coin on the coat hanger and rotate it about the finger. |
| 1D50.45 | coin on coat hanger | Disc 05-18 | A coin is placed on the flat of the hook of an elongated coat hanger and twirled around. |
| 1D50.48 | balls on a propeller | PIRA 1000 | |
| 1D50.48 | balls on a propeller | 1D50.48 | Balls sit in cups mounted on a swinging arm at .5 and 1.0 m. Calculate the period necessary to keep the ball in the outer cup and swing it around in time to a metronome. |
| 1D50.50 | Welch centripetal force | PIRA 1000 | |
| 1D50.50 | Welch centripetal force | 1D50.50 | The angular velocity and mass needed to stretch a spring a certain distance are compared. |
| 1D50.50 | Welch centripetal force review | AJP 28(6),561 | Uses no motor, self contained static force measurement. |
| 1D50.50 | Welch centripetal force | Mm-1 | The angular velocity and mass needed to stretch a spring a certain distance are compared. |
| 1D50.51 | Welch centripetal force modification | AJP 34(10),981 | Two modifications to the apparatus. |
| 1D50.51 | Welch centripetal force | AJP 43(5),466 | A modification to improve the Sargent-Welch 9030 centripetal force apparatus. |
| 1D50.51 | Welch centripetal force modification | AJP 34(8),708 | Improvements to the Welch centripetal force apparatus. |
| 1D50.53 | variable centripetal force | AJP 28(4),377 | A new design for the apparatus that allows any two of the three variables of mass, angular velocity, and distance to be kept constant. |
| 1D50.53 | Cenco centripetal force | TPT 21(3),188 | A relay starts the counter and clock so three hands are not needed when using the Cenco 74470 apparatus. |
| 1D50.53 | Cenco centripetal force | M-16e | Lab apparatus used as a demonstration. |
| 1D50.54 | Cenco centripetal force modification | AJP 45(5),496 | Replace the screw adjustment for the fixed end of the spring with a movable plate. |
| 1D50.55 | hand rotator | TPT 18(6),466 | Two 2000 g spring balances are mounted on a rotator. Equal masses are attached to each and readings are taken at some rotational velocity. |
| 1D50.60 | banked track | PIRA 1000 | |
| 1D50.60 | banked track | 1D50.60 | Need Demo. |
| 1D50.60 | banked track | M-144 | A steel ball rolled down an incline into a funnel reaches an equilibrium level where it revolves in a horizontal plane. |
| 1D50.62 | ball in a megaphone | M-145 | Throw a ball into a megaphone and it turns around and comes out the wide end. |
| 1D50.65 | banked track | TPT 11(3),173 | A turntable can be rotated at various angular frequencies. Objects can be placed at different radii. A small platform can be attached which will swing out to the correct slope for any angular velocity. A device for measuring force is also shown. |
| 1D50.69 | puzzle | M-156 | Two balls in a box must be caught in end pockets simultaneously. |
| 1D50.70 | rolling chain | PIRA 1000 | |
| 1D50.70 | rolling chain | 1D50.70 | A loop of chain is spun up on a disc and released to roll down the lecture bench as a rigid hoop. |
| 1D50.70 | rolling chain | Mm-3 | A flexible chain is spun on a motorized pulley. When it is released, it maintains rigidity as it rolls down the lecture bench. |
| 1D50.70 | rolling chain | M-139 | A loop of chain is brought up to speed on a motorized disc and when released rolls down the lecture bench over obstacles. |
| 1D50.70 | rolling chain | M-16c.2 | A loop of chain spun on a wheel and forced off remains rigid for some time. |
| 1D50.70 | spinning chain | Disc 05-24 | Spin a flexible chain rapidly enough that it acts as a solid object. |