A small body is released from a height $H$ of an inclined plane. At the bottom of the plane is a loop of radius $R$ as shown in the figure below. Ignoring friction, the minimum $H$ required for the body to just complete the loop (that is, reach the point $O$ ) is
A small body is released from a height $H$ of an inclined plane. At the bottom of the plane is a loop of radius $R$ as shown in the figure below. Ignoring friction, the minimum $H$ required for the body to just complete the loop (that is, reach the point $O$ ) is
- A
$2 R$
- B
$\frac{5 R}{2}$
- C
$3 R$
- D
$\frac{7 R}{2}$
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