Question

Friction forces act:

• A. in the direction of force applied
• B. in the direction of the motion
• C. in the direction opposite to the direction of motion
• D. None of these

Hint:

Friction always textbfopposes motion or the tendency of motion. This is true for static, kinetic, and rolling friction.

Answer 1

The Correct Option is C

Step 1: Recall the definition of friction. Friction is a resistive force that opposes the relative motion or the tendency of motion between two surfaces in contact. Step 2: Determine the direction of frictional force. When an object is moving or trying to move on a surface:

Friction always acts opposite to the direction of motion (or impending motion).
Step 3: Analyze the options.

(A) Incorrect — friction does not necessarily act in the direction of applied force
(B) Incorrect — friction never acts in the same direction as motion
(C) Correct — friction acts opposite to motion ✔
(D) Incorrect — a correct option exists
Step 4: Final conclusion. The correct answer is \(\boxed{\text{(C)}}\).