Question

While an athlete is running at a constant acceleration of $4.5m{s}^{-2}$, he exerts a force of $300N$. What is the mass of the athlete?

• A. $64kg$
• B. $69.6kg$
• C. $65kg$
• D. $66.67kg$

Answer 1

The correct option is D

$66.67kg$

Given, force ,$F=300N$ and constant acceleration, $a=4.5m{s}^{-2}$.
Let mass of the athlete be m.
We know, $Force=mass\times acceleration$
So, substituting the values, we get,$300=4.5\times m$
$\Rightarrow$$m=66.67kg$
Therefore, mass of the body is $66.67kg$.