QuestionA tennis ball hits a wall at $10.0 \mathrm{~m/s}$ and returns at $8.0 \mathrm{~m/s}$. Find the average acceleration over $0.045 \mathrm{s}$.

Studdy Solution
Calculate the average acceleration$$a = \frac{-18.0 \mathrm{~m/s}}{0.045 \mathrm{~s}} = -400 \mathrm{~m/s^2}$$The average acceleration of the ball while in contact with the wall is $-400 \mathrm{~m/s^2}$.