A body rest on the top of a hemisphere of radius R. What will be the least horizontal velocity imparted to it , if it has to leave the hemisphere with
A body rest on the top of a hemisphere of radius R. What will be the least horizontal velocity imparted to it , if it has to leave the hemisphere without sliding down?
A. `sqrt(2gR)`
B. `sqrt(5gR)`
C. `sqrt(gR)`
D. `sqrt(3gR)`
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