Question

Mass of an object is $10\mathrm{kg}$. What is its weight?

Answer 1

Mass: Mass is the amount of matter contained in a body. Its SI unit is the kilogram $\left(kg\right).$

Weight: Weight of a body on the surface of the earth is the force with which the earth attracts a body. Its SI unit is Newton $\left(N\right).$

Step 1: Given:

Mass of the object $m=10kg$

The acceleration due to gravity on the surface of earth, $g=9.8m/s^2.$

Step 2: Finding the weight:

$$\begin{gathered} Weight\mathit{=}mass\mathit{\times }acceleration\mathit{}duetogravity \\ W\mathit{=}m\mathit{\times }g \end{gathered}$$

Putting the value of $m=10\mathrm{kg}$ and $\mathrm{g}=9.8\mathrm{m}/{\mathrm{s}}^2$.

$$\begin{gathered} W=10kg\times 9.8m/s^2 \\ W=98\mathrm{N} \end{gathered}$$.

Hence, the weight of the object is $98\mathrm{N}$.