Question

Assertion (A): When an object or body is moving at a constant velocity, with no changes in speed or direction, it is dynamic equilibrium.

Reason (R): A cyclist in motion or the body position maintained by as printer on the track while running are examples of dynamic equilibrium.

In the context of the above two statements, which one of the following is correct?

Options

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

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

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

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

Answer 1

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

Explanation:

• Assertion (A) is true: Dynamic equilibrium occurs when an object is in motion at a constant velocity (meaning zero acceleration and a net force of zero).
• Reason (R) is true: A cyclist moving at a steady pace or a sprinter maintaining a stable posture while running are practical examples of dynamic equilibrium.