Question

Assertion (A): Actually, rotation is always produced by a pair of forces.

Reason (R): The pair of forces formed by the external force and the force of reaction is called a couple.

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:

An applied force and the reaction at the pivot form a pair associated with the rotation, so Assertion (A) is true. This pair is described as a couple in this context; its turning effect accounts for the rotation, so Reason (R) explains Assertion (A).