Question

Newton's second law of motion:

• A. defines force
• B. define inertia
• C. gives measure of force
• D. none of these

Answer 1

The correct option is C

gives measure of force

Explanation for the correct option

(C): gives measure of force

1. Newton's second law of motion states that "the rate of change of momentum of a body is directly proportional to the applied force and takes place in the direction in which the force acts.
2. This law states that force is equal to the rate of change of momentum.
3. So, by using Newton's second law of motion we can measure the force applied to a body.

Explanation for the incorrect option(s)

(A), (B):

1. Newton's second law of motion gives the relation between the force applied to a body and the acceleration acting on a body.
2. It does not define force and inertia.

Hence, Newton's second law of motion gives measure of force. Hence option (c) is correct.