a boy sees a ball going up and then coming down through a window of 2m high. if the total time the ball in sight 1s , the height above the window that the ball rises
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Explanation:
s = u t - 1/2 g t²
u = speed when the ball passes the bottom of the window.
Time duration for traveling window height one way = 1/2 sec.
2.45 = u * 1/2 - 1/2 * 9.8 * 1/2²
=> u = 7.35 m/s
Total height the ball rises from the bottom of the window
s1 = 7.35²/(2*9.8) = 2.75625 m
The height above the top edge of the window, the ball rises
= 0.30625 m
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