Question

Assertion (A): The turning effect on the body about an axis is due to the moment of force (torque) applied on the body.

Reason (R): The moment of a force (torque) is equal to the product of the magnitude of the force and the perpendicular distance of the line of action of the force from the axis of rotation.

Options

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion.

• Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion.

• Assertion (A) is false, but Reason (R) is true.

• Assertion (A) is true, but Reason (R) is false.

Answer 1

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion.

Explanation:

The moment of force is the turning effect of a force about an axis, so Assertion (A) is true. Reason (R) is true because the moment equals force multiplied by the perpendicular distance from the axis; this describes the turning effect and explains Assertion (A).