Al Tobias (wat4y) - Office: Gibson S123 & Physics 218, (434) 924-0538

Physics Demo Manual

Demonstrations are cataloged according to PIRA Bibliography

Due to Physics Building renovations, the lead time to set up demo requests has increased due to the need to transport equipment across campus. Please be kind and let me know well ahead of time what you need.

 Choose a Topic or Enter a keyword to search: I cannot find what I want! You have selected the following Demos: None Selected

Choose a subtopic:
Measurement
Motion In One Dimension
Motion In Two Dimensions
Angular Displacement
Whirligig
video  - Spinning Tray
Centripetal Force
Spinning Chain
Centripetal Acceleration
Rotational Dynamics
video  - Ballistics Cart
video  - Shoot and Drop
Projectile Motion II
video  - The Monkey and the Hunter
video  - Range Gun
Newton's First Law
Newton's Second Law
Newton's Third Law
Statics Of Rigid Bodies
Applications Of Newton's Laws
Gravity
Work and Energy
Momentum
Rotational Motion
Properties of Matter

video  - The Monkey and the Hunter

Purpose:

To illustrate in a somewhat non-intuitive way that all objects fall at the same rate if forces other than gravity can be neglected.

Procedure:

DEMO VIDEO DOWNLOAD - HD - 1920x1080 / 27.4Mbps - 891MB size

DEMO VIDEO DOWNLOAD - LD - 854x480 / 5.69Mbps - 208MB size

Show the students that the air gun is pointed at the center of the target by turning on the laser. If the gun is not pointed at the center of the target, make the proper adjustments.

Using the green knob on the regulator just under the pressure gauge, adjust the pressure so that the brass gauge on the left reads between 30 psig and 60 psig. Press the gas release switch after each adjustment to make sure you have the proper pressure reading.

Turn off the laser and place a dart into the rear opening of the gun barrel. Slide the air hose onto the barrel. When the pressure release switch is pressed, the dart will shoot out of the barrel. As the dart leaves the barrel, it breaks the light path within the photogate which triggers the release of the "bullseye" target. The dart can be made to hit the target at different heights by adjusting the pressure via the green knob of the regulator.

Hints:

Never assume the gun is targeted accurately, always check.