A crate is placed on a smooth incline

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A

10\,\text{kg}

crate is placed on a smooth

45^{\circ}

incline. A vertical downward force of

20\,\text{N}

is applied on the crate by a push rod. Take

g = 9.8\,\text{m s}^{-2}

. Determine the normal reaction between the crate and the plane. (a)

55\,\text{N}

(b)

83\,\text{N}

(c)

89\,\text{N}

(d)

69\,\text{N}

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