A 50.7 g superball traveling at 25.1 m/s bounces off a brick wall and rebounds at 22.8 m/s. A high speed camera records this event. If the ball is in contact with the wall for 3.5 ms, what is the magnitude of the average acceleration of the ball during this time period?(adsbygoogle = window.adsbygoogle || []).push({});

Unfortunately I'm stuck on another problem. For this one I first converted 3.5 ms to 0.0035s. I chose an arbitrary time, such as 4 seconds to give some perspective on time. I multiplied 25.1m/s x 4s to get a distance thinking that it took the ball 4s to hit the wall at that velocity. 25.1 x 4 = 100.4m. Then I determined the time it would take the ball to bounce back the same distance but at 22.8m/s using cross mulitplying and solving for t (time). 22.8m/ 1s = 100.4m/t. Then I used this info. to calculate average acceleration= (v2-v1)/ (t2-t1). I assume that when it asks for the magnitude it means absolute value, correct me if I'm wrong. The answer I got was 0.273 m/s^2 and it's wrong. I used this approach for another problem and it worked so let me know if this is at all the correct approach or if I'm completely off.

Thanks

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# Homework Help: Magnitude of average acceleration

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