MECHANICS - MOTION IN TWO DIMENSIONS - PROJECTILE MOTION NC State University Faculty Access

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Simultaneous Fall - Large
# 1D60.20


Description: This demonstration shows the gravity has the same effect on all objects whether they are dropped, or projected. If both balls start with the same vertical velocity, that no matter what the horizontal velocity, they will land at the same time.

Instructions: This demo will be mounted, loaded, cocked and balanced. Push the lever up until it clears the small pins, which will allow the spring to launch/drop the balls.

This spring is *very* tough to compress, particularly in class, so this is pretty much a one shot demo.

Hazards: The launched ball does not travel that fast or far, but the balls are heavy, so watch your feet and nearby students.

Parts: Ball launcher
Right angle clamp
Table clamp with rod attachment
2 large bocce balls

Purchased/Built: built

Quant. in Demo Room: 1

Demo References
The Video Encyclopedia of Physics Demonstrations Disc 02-01 Drop one ball and simultaneously project another horizontally.
Sutton M-91 Two apparatuses are described for dropping one ball and projecting another.
Hilton M-13b One ball is projected horizontally as another is dropped.
Freier and Anderson Mb-14 A spring loaded device drops one ball and projects the other horizontally.

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