A ball is thrown vertically upward with a velocity U from the top of a tower is strike the ground with velocity III you the time taken to reach the ground is
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u (initial velocity) = U
v (final velocity) = 3U
by 1st equation of motion,
v= u + at
3U =U + 10*t
2U = 10t
t= U/5
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v (final velocity) = 3U
by 1st equation of motion,
v= u + at
3U =U + 10*t
2U = 10t
t= U/5
Mark as brainliest if it helps
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