## Question:

The tennis ball is struck with a horizontal velocity ${ v }_{ A }$, strikes the smooth ground at B, and bounces upward at θ = ${ θ }_{ 1 }$. Determine the initial velocity ${ v }_{ A }$, the final velocity ${ v }_{ B }$, and the coefficient of restitution between the ball and the ground. Given: h = 7.5 ft , d = 20 ft , ${ θ }_{ 1 }$ = 30 deg , g = ${ 32.2ft/s }^{ 2 }$