A tennis ball of mass 0.0631 kg is served. It strikes the ground with a velocity of 54.0 m/s (120 mi/h) at an angle of 22.0° below the horizontal. Just after the bounce it is moving at 53.0 m/s at an angle of 18.0° above the horizontal.
If the interaction with the ground lasts 0.0630 s, in what angle does the average force exerted by the ground on the ball act?

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A tennis ball of mass 0.0631 kg is served. It strikes the ground with a velocity...
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