Question

What is the unit of momentum?

• A. newton second
• B. joule second
• C. erg second
• D. pascal second

Hint:

Momentum is a vector quantity and its unit is typically represented as newton second (N·s) in the SI system.

Answer 1

The Correct Option is A

Momentum is defined as the product of mass and velocity. The unit of mass is kilograms (kg), and the unit of velocity is meters per second (m/s). Therefore, the unit of momentum is: \[ \text{Unit of Momentum} = \text{kg} \cdot \text{m/s} \] In terms of SI units, a newton (N) is defined as \( \text{kg} \cdot \text{m/s}^2 \). So, the unit of momentum can also be written as newton second (N·s). Thus, the correct answer is \( \boxed{\text{newton second}} \).