PrepRung
Sign inSign up free

NDA 2016 GAT · General Knowledge · Units and Measurements · easy

Physical quantities is a vector?

Single correct option

Which one of the following physical quantities is a vector?
  1. A. Kinetic energy
  2. B. Power
  3. C. Speed
  4. D. Momentum
Show answer and solution

Answer: (D) Momentum

Momentum is mass times velocity, so it has both magnitude and direction. Kinetic energy and power are scalars because they have magnitude only, and speed is the magnitude of velocity, hence also a scalar. The common trap is to treat speed as a vector because it sounds like velocity, but it carries no direction.
Report a mistake

Original question written in the NDA 2016 GAT pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake