Question

A block of mass m is placed on a smooth inclined plane of inclination θ with the horizontal. The force exerted by the plane on the block has a magnitude.

Options

•  mg

• mg/cosθ

• mg cosθ

•  mg tanθ

Answer 1

mg cosθ

From the free-body diagram,
N = mg cosθ
Normal force exerted by the plane on the block is mg cosθ.