Answer:
F = -52.8 N
Step-by-step 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 )
