Question

A body of mass $0.2kg$ is rotated along a circle of radius $0.5m$ in the horizontal plane with uniform speed $3m/s$. The centripetal force acting on that body is:

• A. $1.8N$
• B. $3.6N$
• C. $18N$
• D. $36N$

Answer 1

The correct option is B $3.6N$

Given, $m=0.2kg$, $R=0.5m$ and $v=3m/s$
Therefore, $F_c=\frac{m{v}^2}{R}$$=\frac{\left(0.2\right)\left(0.3^2\right)}{\left(0.5\right)}$$=3.6N$