Posted by **Fatima** on Sunday, January 22, 2012 at 11:48am.

A 95 g tennis ball is traveling at 106 km/h when it bounces of a wall and travels in the opposite direction it came from at a speed of 88 km/h.

a. Determine the impulse on the ball if the. (donâ€™t forget that it is a vector)

b. If the average force exerted on the ball by the wall is 450 N, determine the time the ball stayed in contact with the wall.

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