A block slides down a frictionless incline. The path at the bottom of the incline is an arc of a circle. The direction of the net force on the block at the bottom of the arc (point P) is along (use the compass rose)
A) (a)
B) (b)
C) (c)
D) (d)
E) (e)

Question

A block slides down a frictionless incline. The path at the bottom of the incline is an arc of a circle. The direction of the net force on the block at the bottom of the arc (point P) is along (use the compass rose) 
A) (a) 
B) (b) 
C) (c) 
D) (d) 
E) (e)

Quizplus · Accepted Answer

At the bottom of the arc, the block is moving horizontally and there is no net force acting in the vertical direction. Therefore, the net force must be along the direction of the velocity, which is towards the right (direction A).

A Block Slides Down a Frictionless Incline