Question

A body of mass $40kg$ is moving in a circle of radius $20m$ with a speed of $2m/s$. Find the centripetal force acting on the body.

• A. $8N$
• B. $6N$
• C. $4N$
• D. $16N$

Answer 1

The correct option is A $8N$

Given:

speed = $2m/s$

radius = $20m$

mass = $40kg$

Force = $\frac{m{v}^2}{r}$

$\Rightarrow$F = $\frac{40\times 2^2}{20}$

$\Rightarrow$F = 8 $m/s$