# Physics

posted by Angie

A 500 g ball moving to the right at 9.2 m/s hits a wall and bounces in the other direction with a speed of 4.9 m/s. If the ball experiences an average force of 110 N during the impact with the wall, for how long is the ball in contact with the wall?

1. Scott

f = m a ... 110 = .5 a

a = Δv / Δt

110 = .5 (9.2 + 4.9) / t

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