A block of mass m sits at rest on a rough inclined ramp that makes an angle ? 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 ?
C) F > mg sin ?
D) F = mg cos ?
E) F = mg sin ?
D
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Indicate whether the statement is true or false