PIRA Code(s): 1D60.10 Set up time:1 minute Operation: Press down on the inside of the cup. Turn the cart over, and stick the pin in the hole that protrudes from the bottom of the cart. Place the ball inside the cup. Then, push the car at a constant velocity as you gently pull the string. The ball should pop up and land in the cup again. Physics and Science Concepts: Mechanics, Motion in Two Dimensions, Projectile Motion Safety: None
PIRA Code(s): 1D60.20 Set up time:5 minutes Operation: Mount apparatus to ring stand using clamp, adjust until apparatus is horizontal, cock the apparatus spring, and place the masses (one at the end of the apparatus and one on the bar that extends from the apparatus), release, and one ball will fall from rest (hung on the rod) while the other ball is struck by the rod and has an initial horizontal velocity. The balls should hit the table at the same time, which can be heard clearly by students. Repeat by cocking spring to different compression. Repeat by clamping apparatus at a different height to show that height has no effect on the simultaneity of the fall. Physics and Science Concepts: Projectile Motion Safety: Once spring is compressed, do not put hands in front of the end of the rod.
PIRA Code(s): 1D60.30 Set up time:10 minutes Operation: Set up two ring stands about 8 feet apart. Put the blow gun in the clamp on one stand with the power cords to the inside of the set up. Attach the pole with the magnet to the other ring stand. Place the ball into the blow gun. Switch the power supply on which connects the circuit and then place the monkey (band aid box) on to the magnet, upside down. Make sure the blow gun is aimed directly at the broad side of the monkey. Now, blow into the blow gun to release the ball and break the circuit, thus causing the monkey to fall. The ball should hit the monkey as it falls. Physics and Science Concepts: Projectile Motion, Gravity, and Mechanics Safety: Do not turn power supply on before inserting the ball into the blow gun, due to possible electrocution.
Not all pieces (ring stand, 5 V ½ Amp DC power supply, and clamps) are in the kit, these items need to be acquired.
PIRA Code(s): 1L20.40 Set up time:5 minutes Operation: Remove pieces from the cone to show different conic sections. Physics and Science Concepts: Gravity Safety: Nails that connect pieces may be sharp.
PIRA Code(s): 1Q40.23 Set up time:1 minute Operation: Place the shaft of the device into the hole and tighten the screw. Then, plug in the motor and turn on the red switch. When spun, the hoops will show oblation, the balls on the governor will move outwards, and the liquid in the glass sphere will move to the edge of the sphere. Physics and Science Concepts: Rotational Dynamics, Centrifugal Force, Oblation Safety: Wear goggles when running the apparatus and keep hands away from the belt.
PIRA Code(s): 1Q40.30, 1Q50.24 Set up time:3 minutes Operation: Stand on the stool as it remains still. Have someone start the motor and place the bicycle wheel next to it to get it to start spinning. Take the spinning wheel in your hands and turn the wheel in a horizontal position and you should spin. When the wheel is placed vertical again, you will spin the opposite direction.
Use the motor to start the wheel spinning. Hold on to the cord attached to the axle and the wheel will remain vertical. Physics and Science Concepts: Mechanics, Rotational Dynamics Safety: Do not get items caught in the motor or the spokes of the tire. Hold wheel out from the body as far as possible
PIRA Code(s): 1Q40.40 Set up time:5 minutes Operation: Place the train on the track. Plug the track into the variac and start the train by moving the dial. Physics and Science Concepts: Mechanics, Angular Momentum, Rotational Dynamics, Angular Momentum, Relative Motion Safety: Watch for sparks from the train. Maintain a cautious distance from the wheel.
PIRA Code(s): 1Q40.42 Set up time:1 minute Operation: Instructions included in box. Must obtain ring stand and clamp from 9C40.71 and 9C40.72, respectively. A known weight attached to a string around the wheel torques the wheel a constant amount. Physics and Science Concepts: Moment of Inertia, Mechanics Safety: Use caution around spinning wheel.
PIRA Code(s): 1Q40.80 Set up time:5 minutes Operation: Partially fill flask with water. Attach flask by string to ring stand. Then, use a Bunsen burner or a torch to heat the flask. The flask should rotate as the steam emerges from the arm. Physics and Science Concepts: Rotational Dynamics, Conservation of Angular Momentum, Safety: Use caution around Bunsen burner or torch. Do not overheat the glass as it may shatter. Eye protection should be worn. The torch can be acquired from the machine shop if necessary.
PIRA Code(s): 3A10.40 Set up time:none Operation: Push the pendulum so that it swings back and forth at an angle of about 0 º. Then, slowly increase the angle, and watch the frequency decrease. For a more effective demonstration, start the pendulum at a relatively high angle, and then decrease the angle of the plane of oscillation so that the frequency of the pendulum will increase over time. Physics and Science Concepts: Oscillations Safety: None
PIRA Code(s): 5C30.40 Set up time:5 minutes Operation: Jars can be charged with either the Wimshurst generator (5A50.10) or Van de Graaf generator (5A50.30). Charge Leyden jars in parallel and discharge, charge in parallel again and connect in series before discharging. The intensity of the sparks as well as their duration is much greater for the series connection. Physics and Science Concepts: Electricity and Magnetism, Capacitance Safety: Do not touch the charged capacitor. Make sure the jar is discharged before storing or touching.