Question

An object of weight W is pulled along a rough horizontal surface by a force F. The force of friction is $F_r$. Which diagram correctly shows the direction of these forces on the object?

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

Weight (force due to gravity) of the object always acts in the downward direction.
Friction force always acts in a direction opposite to the direction of applied force. So, here the friction force ($F_r$) will be acting just opposite to the direction of the applied force (F).
Therefore, the correct option is (c).