A block of mass M slides down a frictionless plane inclined at an angle θ with the horizontal. The gravitational force is directed
A) parallel to the plane in the same direction as the movement of the block.
B) parallel to the plane in the opposite direction as the movement of the block
C) perpendicular to the plane.
D) toward the center of the Earth.
E) toward the center of mass of the block.

Question

Quizplus · Accepted Answer

The gravitational force always acts toward the center of the Earth, regardless of the block's movement or orientation of the plane.

A Block of Mass M Slides Down a Frictionless Plane