A ball is thrown upward from the edge of a flat roof 80 m above the ground. The ball rises and then falls with insignificant air resistance, and strikes the ground. The initial velocity of the ball is 90.0 m/s Consider all quantities as positive in the upward direction. The velocity of the ball when it is 56 m above the ground is O 81 m/s. O -64 m/s. O 93 m/s. O -48 m/s. O -93 m/s.

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A ball is thrown upward from the edge of a flat roof 80 m above the ground. The ball rises and then falls with insignificant air
resistance, and strikes the ground. The initial velocity of the ball is 90.0 m/s Consider all quantities as positive in the upward
direction. The velocity of the ball when it is 56 m above the ground is
O 81 m/s.
O -64 m/s.
O 93 m/s.
O -48 m/s.
O -93 m/s.
Transcribed Image Text:A ball is thrown upward from the edge of a flat roof 80 m above the ground. The ball rises and then falls with insignificant air resistance, and strikes the ground. The initial velocity of the ball is 90.0 m/s Consider all quantities as positive in the upward direction. The velocity of the ball when it is 56 m above the ground is O 81 m/s. O -64 m/s. O 93 m/s. O -48 m/s. O -93 m/s.
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