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A ball is dropped from the top of a tower . The ball takes 0.5sec to fall past the 3m length of a window at certain distance from the top of the tower. Speed of the ball as it crosses the top edge of the window is(g=10)?
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A ball is dropped from the top of a tower . The ball takes 0.5sec to f...
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Method to Solve :

Use the formula for distance, knowing the time.

s = (v0 * t) + (0.5 * g * t^2)
m = (v0 * 0.5) + ( 0.5 * 9.8 * 0.5^2)
3 = (v0 *0.5) + (4.9 * 0.25)
3 = (v0 * 0.5) + (1.225)
v0 = (3 - 1.225) / 0.5
v0 = 3.55 m/sec
This is the velocity when the ball reaches the top of the window.

The formula for final velocity of a falling ball is

vf = v0 + (g * t)
3.55 = 0 + (9.8 * t)
t = 3.55 / 9.8
t = 0.362244 seconds
This is the time it took the ball to reach the top of the window (when velocity = 3.55 m/sec0
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A ball is dropped from the top of a tower . The ball takes 0.5sec to fall past the 3m length of a window at certain distance from the top of the tower. Speed of the ball as it crosses the top edge of the window is(g=10)?
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