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To calculate the average acceleration of a tennis ball that strikes a wall, the initial velocity is 40.0 m/s to the right, and the final velocity after rebounding is -8 m/s to the left. The time of contact with the wall is 0.014 seconds. The change in momentum can be calculated using the formula FΔt = mv_f - mv_i. By applying the relationship F = ma, the average acceleration can be determined from the change in momentum over the time of contact. Understanding momentum and impulse is crucial for solving this problem effectively.
febreze
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I've been killing myself over this problem because I cannot figure it out. Can someone please help me?


A tennis ball with a velocity of 40.0 m/s to the right is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a velocity of -8 m/s to the left. If the ball is in contact with the wall for 0.014 s, what is the average acceleration of the ball while it is in contact with the wall?
 
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Have you learned about momentum and impulse?

Force multipled by time gives you change in momentum.
F\Delta{t}=mv_f-mv_i

Then just use F=ma
 

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