Question

What is the standard unit of measuring weight?

• A. gram
• B. Newton
• C. meter
• D. second

Answer 1

The correct option is B

Newton

Step 1: Weight

1. Weight is defined as the gravitational force with which the Earth attracts the masses towards its center.
2. It is denoted by $\mathrm{W}$.
3. The mathematical expression for weight is $\mathrm{W}=\mathrm{mg}$, where $\mathrm{W}$ is the weight, $\mathrm{m}$ is the mass, $\mathrm{g}=9.8\mathrm{m}/{\mathrm{s}}^2$is the acceleration due to gravity.
4. Weight is a vector quantity, directed toward the center of the earth.

Step 2: SI unit of weight

1. Newton is the SI unit of weight, as weight is force.
2. Dimension of weight is $\left[{\mathrm{M}}^1{\mathrm{L}}^1{\mathrm{T}}^{-2}\right]$.

Step 3: An illustrative diagram of weight

Therefore, option B is correct.