PHYSICS LECTURE DEMONSTRATIONS
M-K1 : Propeller Cart
UNIT:
Conservation of Momentum
PURPOSE:
Illustrate the concepts of velocity and acceleration for straight-line motion (with constant acceleration).
EQUIPMENT:
1.
Electric motor-driven cart with a propeller (CENCO)
2.
Detachable screen
2.
Two AAA batteries
SUGGESTIONS:
Screen out.
1.
With motor "off" illustrate friction: v
o
> 0, a > 0; v
o
< 0, a > 0
2.
With motor "on" illustrate: v
o
> 0, a < 0; v
o
< 0, a < 0
3.
Can it be: v
o
= 0, a > 0
4.
Can it be: v
o
> 0, a = 0
5.
What will happen if the screen is attached?
DISCUSSION:
--
1. 2.
1.
V > 0
2.
V = 0
