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Jule J.

asked • 12d

finding initial speed

 A ball is thrown straight up from ground level. It passes a 2-m-high window. The bottom of the window is 7.5 m off the ground. The time that elapses from when the ball passes the bottom of the window on the way up, to when it passes the top of the window on the way back down is 1.3 s.

What was the ball’s initial speed, in meters per second?

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