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A 23 kg ball is projected upward at time t = 0.0 s, from a point...

A 23 kg ball is projected upward at time t = 0.0 s, from a point on a roof 76 m above the ground and experiences negligible air resistance. The ball rises, then falls and strikes the ground. The initial velocity of the ball is 20.8 m/s. Consider all quantities as positive in the upward direction. You may assume the acceleration due to gravity is 9.8 m/s2.

The speed of the ball when it is 17.6 m above the ground is closest to

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