Assertion If force is not parallel to the velocity of the body, but makes some angle with it, it changes the component of velocity along the direction of force. Reason The component of velocity normal to the force remains unchanged.

Question

Assertion If force is not parallel to the velocity of the body, but makes some angle with it, it changes the component of velocity along the direction of force. Reason The component of velocity normal to the force remains unchanged. (A) Both Assertion and Reason are correct and Reason is the correct explanation of Assertion. (B) Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion. (C) Assertion is correct but Reason is incorrect. (D) Assertion is incorrect but Reason is correct.

Tardigrade Admin · Accepted Answer

Force is a vector quantity. Thus, if force is not parallel to the velocity of the body, but makes some angle with it, it changes the component of velocity along the direction of force.
The component of velocity normal to the force remains unchanged, e.g. in projectile motion, horizontal component of velocity does not change under the effect of vertical gravitational force.
Therefore, Assertion and Reason are correct but Reason is not the correct explanation of Assertion.

Q. Assertion If force is not parallel to the velocity of the body, but makes some angle with it, it changes the component of velocity along the direction of force. Reason The component of velocity normal to the force remains unchanged.

Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.

Assertion is correct but Reason is incorrect.

Assertion is incorrect but Reason is correct.

Q. Assertion If force is not parallel to the velocity of the body, but makes some angle with it, it changes the component of velocity along the direction of force.
Reason The component of velocity normal to the force remains unchanged.