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): 1M20.10 Set up time:none Operation: These may be used by themselves or with other demonstrations. Physics and Science Concepts: Mechanics, Mechanical Advantage, Simple Machines Safety: None
PIRA Code(s): 1M20.30 Set up time:5 minutes Operation: Set the empty friction box on the incline with weights attached to the string on the other side of the pulley so that the box slides forward. Then, gradually increase the angle of the plane until the box and the weights reach equilibrium. Physics and Science Concepts: Equilibrium of forces, Mechanics, Work and Energy Safety: None
PIRA Code(s): 1M40.20 Set up time:none Operation: Place ball at the top of track and let it fall. To show students the minimum height required to loop the loop, place the ball on the track at a height that is about double the height of the loop. Physics and Science Concepts: Mechanics, Work and Energy, Conservation of Energy, Centripetal Force Safety: Do not stand where the ball exits the track.
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): 1Q50.30 Set up time:1 minute Operation: Rotational Dynamics, Mechanics, Gyroscopic Motion Physics and Science Concepts: Rotational Dynamics, Mechanics, Gyroscopic Motion Safety: The central gyroscope is quite heavy and can pinch fingers.
PIRA Code(s): 1Q50.60 Set up time:2 minutes Operation: Use the string or turn the rotor with your thumb to start the gyroscope spinning. Take care to hold the gyroscope and metal hold in place relative to the top block of wood. Then, spin the wooden block, stop it, and reverse the direction of the spin. The gyroscope will do a spin flip. Physics and Science Concepts: Rotational dynamics, Mechanics Safety: None
PIRA Code(s): 2B30.30 Set up time:3 minutes Operation: Place the two halves together. Put the vacuum pump on the valve and evacuate the air inside. Try to separate the pieces. Vacuum pump not included; it must be obtained from demo 3B30.30. Physics and Science Concepts: Fluid Mechanics, Statics of Fluids Safety: None
PIRA Code(s): 4A30.20 Set up time:2 minutes Operation: Try putting the ring around the ball. At room temperature the ring is slightly larger than the ball. Heat the ball over a Bunsen burner and it will no longer fit through the ring. Physics and Science Concepts: Thermodynamics, Thermal Properties of Matter, Thermal Expansion Safety: Use caution when using a Bunsen burner. The Bunsen burner is not included in the experiment.
PIRA Code(s): 3B10.30 Set up time:none Operation: Displace the rod at one end to create a torsion pulse or wave. The other end can be left free to move, fixed in place, or critically damped. To damp the model, clip the damping cup to the last rod on one end to get an inverse reflex wave. The damping clip on the rod ends the wave entirely. Physics and Science Concepts: Torsion Waves, Waves and Oscillations Safety: None