A crate is pulled up a rough incline making with the horizontal by a constant force…

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

Problem

4\,\text{kg}

crate is pulled up a rough incline making

30^{\circ}

with the horizontal by a constant force

F

acting parallel to the incline. The coefficient of kinetic friction between the crate and the plane is

0.20

. Starting from rest, the crate moves

3\,\text{m}

up the plane and attains a speed of

2\,\text{m\,s}^{-1}

. What is the magnitude of

F

? (a)

34\,\text{N}

(b)

24\,\text{N}

(c)

29\,\text{N}

(d)

39\,\text{N}