a peerson hits tennis ball with mass 0.058 kg angainst a wall perpendicular to wall is 11 m/s 2.1 s on average
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A person hits a tennis ball with a mass of $0.058 \mathrm{kg}$ against a wall. The average component of the ball's velocity perpendicular to the wall is $11 \mathrm{m} / \mathrm{s}$, and the ball hits the wall every $2.1 \mathrm{s}$ on average, rebounding with the opposite perpendicular velocity component. (a) What is the average force exerted on the wall? (b) If the part of the wall the person hits has an area of $3.0 \mathrm{m}^{2}$, what is the average pressure on that area?
Krishna G.
A tennis ball with a speed of 15.9 m/s is moving perpendicular to a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 13.8171 m/s. If the ball is in contact with the wall for 0.0116 s, what is the average acceleration of the ball while it is in contact with the wall? Take "toward the wall" to be the positive direction. Answer in units of m/s^2.
Narayan H.
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