PHYSICS   LECTURE   DEMONSTRATIONS

M-E1   :   Rolling Track

UNIT: Work and kinetic energy
PURPOSE: Illustrate work-kinetic energy theorem. 
EQUIPMENT:
1. Curved track on a stand
2. Several balls to roll
SUGGESTIONS:
1. Release balls from one end and catch them when they come momentarily to rest upon return; note the initial and the final positions.
2. Discuss the role of the height of end-points of the track, and its shape, in applying W=DK theorem
3. Discuss the difference between the initial and final rest positions in terms of friction, and compare the rolling friction of a few balls.
DISCUSSION:  --

1.                                                2.                                               3.

1. Releasing the ball
2. Ball in transit
3. Ball reaches the other end