A packing crate rests on a horizontal surface.It is acted on by three horizontal forces: 600 N to the left,200 N to the right,and friction.The weight of the crate is 400 N.If the 600-N force is removed,the resultant force acting on the crate is
A) zero.
B) 200 N to the right.
C) 200 N to the left.
D) 400 N to the left.
E) impossible to determine from the information given.

Question

Quizplus · Accepted Answer

The crate is initially in equilibrium, since the forces to the right and left balance each other out, and the force of friction is equal and opposite to the resultant force. When the 600 N force to the left is removed, the forces to the right and left are no longer balanced, but the force of friction is still equal and opposite to the resultant force. Therefore, the net force on the crate is zero, and it remains in equilibrium.

A Packing Crate Rests on a Horizontal Surface