Question

A ball of mass m strikes a wall with a speed x and retraces its path with the speed y. If the ball is in contact with the wall for time t, then the magnitude of average force exerted by the wall on the ball is

Answer 1

given that, x is the velocity before striking the wall and y is the velocity while retracing the path. by sign convention, let x be (-x) and y be +y

Let the object has a mass of 'm'.

Force= Mass * Acceleration

Force = m {y-(-x)}/t

Force = m (x+y)/t

Answer 2

Answer:

option mt/(x+y) this answer I have in my book