Question

The first law of motion defines

• A. Inertia
• B. Force
• C. Both inertia and force
• D. Neither inertia nor force

Answer 1

The correct option is A

Inertia

Explanation for the correct option

(A): Inertia

1. As we know the first law of motion says that an object will remain in the steady-state position or it will be in uniform motion unless an external force act on it and change the position.

The above statement is also known to define inertia.

Explanation for the incorrect option

(B): For the second law of motion, the rate of change of momentum depends on the applied unbalance force. It defines the force.

Hence, the first law of motion defines inertia. Hence option (a) is correct.