Question

The weight of a boy on the surface of the earth is 300 N. What will be his mass? { take $g=10m/s^2$}

• A. $20\text{kg}$
• B. $30\text{kg}$
• C. $300\text{kg}$
• D. $200\text{kg}$

Answer 1

The correct option is B $30\text{kg}$

weight = mg ,
where m is mass in kg and g is acceleration due to gravity in $\left(m/s^2\right)$
mass $m=\left(\frac{\text{weight}}{g}\right)=\frac{300}{10}=30\text{kg}$