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11 May, 09:36

A 50.0-g super ball traveling at 27.0 m/s bounces off a brick wall and rebounds at 16.0 m/s. a high-speed camera records this event. if the ball is in contact with the wall for 3.90 ms, what is the magnitude of the average acceleration of the ball during this time interval?

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  1. 11 May, 09:37
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    We can use kinematics to find the average acceleration. Let v0 = - 27.0 m/s and let vf = 16.0 m/s. vf = v0 + at a = vf - v0 / t a = 16.0 m/s - (-27.0 m/s) / 3.90 x 10^{-3} s a = 43.0 m/s / 3.90 x 10^{-3} s a = 1.10 x 10^4 m/s^2 The average acceleration during this time interval is 1.10 x 10^4 m/s^2
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