A Ball Is Projected Upward at Time T = 0

question 75

Multiple Choice

A ball is projected upward at time t = 0 s, from a point on a flat roof 90 m above the ground. The ball rises and then falls with insignificant air resistance, missing the roof, 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 vertical velocity of the ball when it is 89 m above the ground is closest to

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

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