Question

A mover in a moving truck is suing a rope to pull a 400-pound box up a ramp

that has an incline of 25o. What is the force needed to hold the box in a
stationary position to prevent the box from sliding down the ramp?

Answer 1

Explanation:

The pulling force

Answer 2

F = -52.8 N

Explanation:

Given :

Inclination angle : 25°

Weight, W = 400 lb

The force N will push the box against the ramp.

Therefore, Force F will prevent the box from sliding down the ramp.

F = W sin 25°

= 400 x (-0.132)

= -52.8 N ( negative sign shows that the force applied in the opposite direction )