You toss a racquetball directly upward and then catch it at the same height you

Question

You toss a racquetball directly upward and then catch it at the same height you released it 1.70 s later. Assume air resistance is negligible. What is the acceleration of the ball while it is moving upward? magnitude m/s2 What is the acceleration of the ball while it is moving downward? magnitude m/s2 What is the acceleration of the ball while it is at its maximum height? magnitude m/s2 What is the velocity of the ball when it reaches its maximum height? magnitude m/s What is the initial velocity of the ball? magnitude m/s What is the maximum height that the ball reaches? m

Explanation / Answer

a) a = g = 9.81 m/s2

downwards

b) a = g = 9.81 m/s2

downwards

c) a = g = 9.81 m/s2

downwards

d) velocity = zero ( because it is at rest at that moment)

e) v = u + at

- u = u - 9.81x 1.70

u = 8.34 m/s

f) v^2 - u^2 = 2ah

0 - 8.34^2 = 2x9.81 x h

h = 3.54 m

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