Question

What are the units of weight in SI system?

Answer 1

The weight of a body is:

1. a variable quantity
2. dependent upon acceleration due to gravity
3. a vector quantity
4. measured in newtons$\left(N\right)$ in SI system
5. can be zero, if $g=0$

Thus, mathematically the weight of a substance is the product of its mass and acceleration due to gravity.

$$\begin{gathered} Weight\left(W\right)=Mass\left(m\right)\times Accelerationduetogravity\left(g\right) \\ \Rightarrow W=m\times g \end{gathered}$$