A tennis ball with a speed of 18.2 m/s ismoving perpendicular to a wall. After strikingthe wall, the ball rebounds in the oppositedirection with a speed of 13.6136 m/s.If the ball is in contact with the wall for0.0141 s, what is the average acceleration ofthe ball while it is in contact with the wall?Take toward the wall to be the positivedirection.Answer in units of m/s2
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