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Saitama
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Homework Statement
A ball of mass m bounces between two parallel walls, such that its velocity v is perpendicular to the walls.The collisions with the walls are totally elastic. What is the average force exerted by the ball on the walls, if the distance between the walls is d?
Homework Equations
The Attempt at a Solution
When the ball collides with one of the walls and bounces back, the total change in momentum is ##2mv##. The average force can be calculated by
[tex]F_{avg}=\frac{2mv}{\Delta t}[/tex]
What can I substitute for ##\Delta t## here?
Thanks!