A small body of mass $m$ slides down from the top of a hemisphere of radius $r$. The surface of block and hemisphere are frictionless. The height at which the body lose contact with the surface of the sphere is
A small body of mass $m$ slides down from the top of a hemisphere of radius $r$. The surface of block and hemisphere are frictionless. The height at which the body lose contact with the surface of the sphere is
- A
$\frac{3}{2}r$
- B
$\frac{2}{3}r$
- C
$\frac{1}{2}g{t^2}$
- D
$\frac{{{v^2}}}{{2g}}$
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