Question

Read the given statements and select the correct option.

Assertion: Friction is a self-adjusting force.

Reason: Friction does not depend upon the mass of the body.

• A. If both assertion and reason are true and reason is a true explanation of assertion.
• B. If both assertion and reason are true but reason is not the correct explanation of assertion.
• C. If assertion is true but reason is false.
• D. If both assertion and reason are false.

Answer 1

The correct option is D

If both assertion and reason are false.

The explanation for the correct option

1. Friction is a resistive force that comes into action when a body tries to move over another body.
2. Limiting friction, Static friction, kinetic friction, and rolling friction are some of the common types of friction.
3. Only static friction is self-adjusting in nature because it is equal and opposite in the direction of the applied force.
4. Frictional force, $f=$$\mu mg$
5. Frictional force is directly proportional to the mass of the body.

Hence, option (d) will be correct.