A block of mass m sits at rest on a rough inclined ramp that makes an angle θ with the horizontal.What must be true about the force F that the ramp exerts on the block perpendicular to the surface of the ramp?
A)F mg
B)F mg cos θ
C)F mg sin θ
D)F = mg cos θ
E)F = mg sin θ

Question

A block of mass m sits at rest on a rough inclined ramp that makes an angle θ with the horizontal.What must be true about the force F that the ramp exerts on the block perpendicular to the surface of the ramp?
A)F > mg
B)F > mg cos θ
C)F > mg sin θ
D)F = mg cos θ
E)F = mg sin θ

Quizplus · Accepted Answer

The force F that the ramp exerts on the block perpendicular to the surface of the ramp is the normal force, which balances the component of the gravitational force acting perpendicular to the ramp. This component is mg cos θ, so F = mg cos θ.

A Block of Mass M Sits at Rest on a Rough