Two identical carts sitting on an airtrack are pushed towards each other.(Note:
ID: 581453 • Letter: T
Question
Two identical carts sitting on an airtrack are pushed towards each other.(Note: in an airtrack, high pressure air comes out of many small holes along
the track to minimize friction)The carts approach each other, then bounce off elastically.The figure below shows the carts approaching each other with equal speed.
In the movie of the collision, the frame shown below is the one in which the carts are the closest to each other during the collision.
1. At this instant of time, identify all the forces acting on the left cart. Are any of these forces of the same size, so that they will cancel?
After bouncing off each other, the carts move apart once again
2. What are the respective velocities of the left and right carts?
Explanation / Answer
1. Here ,
on the left cart , forces that are acting are :
> Normal force from the track
gravity force
force from right cart.
yes , normal force and gravtiy are equal anf cancel out.
2.
as the collision is elastic
velocities will be same in magnitude but in oposite direction
velocity of right cart = Vo
velocity of left cart = - Vo
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