Question

Which physical quantity has its unit as 'Newton'?

• A. Friction
• B. Acceleration
• C. Force
• D. Momentum

Answer 1

Answer: (A), (C)

Force

Explanation of the correct option

A: Friction

1. Friction is a force that resists the relative motion of two things.
2. As a result, friction and force will have the same unit.
3. Newton (N) is the SI unit of force and friction.
4. The CGS unit of force is the dyne.

C: Force

1. We know that force $F=ma$.
2. S.I unit of mass is$kg$ and acceleration unit is $m/s^2$.
3. As a result, Newton (N) is the SI unit of force.

Explanation of the incorrect option

B: Acceleration

1. We know that rate of change of velocity with respect to time is called acceleration and the acceleration unit is $m/s^2$.

D: Momentum

1. The product of mass and velocity yields the unit of momentum. If the mass is in kilograms and the velocity is in meters per second, the momentum is in kilograms meters per second ($kgm/s$) in SI units.

Hence, option (A) and (C) is the correct answer.