A Box Slides Down a Frictionless Plane Inclined at an Angle

Multiple Choice

A box slides down a frictionless plane inclined at an angle θ above the horizontal.The gravitational force on the box is directed

A) parallel to the plane in the same direction as the movement of the box.
B) parallel to the plane in the opposite direction as the movement of the box.
C) perpendicular to the plane.
D) vertically.
E) at an angle θ below the inclined plane.