A ball is allowed to fall from a height of 80m high as soon as the ball reaches half way, the g suddenly disappear. Discuss the condition of the ball after that moment
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Solution Lets find how much did the ball fall from the top till the moment
gravity disappeared
S = gt2
/2 = 10 · 2
2
/2 = 20 m
So, its 80-20 = 60 m left to fall. Its velocity was at that moment
v = gt = 10 · 2 = 20 m/s
Hence, time taken to reach ground is
t2 =
60
20
= 3 s
Explanation:
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