A Ball Is Projected Upward at Time T = 0

question 15

Multiple Choice

A ball is projected upward at time t = 0.0 s,from a point on a roof 90 m above the ground.The ball rises,then falls and strikes the ground.The initial velocity of the ball is 80.5 m/s.Consider all quantities as positive in the upward direction.The velocity of the ball when it is 89 m above the ground is closest to:

• A)- 81 m/s
• B)- 64 m/s
• C)- 48 m/s
• D)- 32 m/s
• E)- 97 m/s

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