Question

Which of the following unit is not a base unit ?

• A. $\text{Newton (N)}$
• B. $\text{second (s)}$
• C. $\text{meter (m)}$
• D. $\text{kilograms (kg)}$

Answer 1

The correct option is A $\text{Newton (N)}$

As we know that $\text{meter (m), second (s)}$ and $\text{kilograms (kg)}$ are base units, but unit of force is derived by these base units.
Hence, unit of force $\text{(kg}.{\text{m/s}}^2=\text{N})$ is derived unit.

Hence, option $\left(\text{D}\right)$ is correct.