A particle rests on the top of a hemisphere of radius R. Find the smallest horizontal velocity that must be imparted to the particle if it is to leave the hemisphere without sliding down it
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a
gR
b
2gR
c
3gR
d
5gR
answer is A.
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Detailed Solution
The velocity should be such that the centripetal acceleration is equal to the acceleration due to gravityV2R=g or V=gR