Question

A $0.2kg$ mass is rotated in a horizontal circle of radius $10cm$. If its angular speed is $0.4rad/s$, find the centripetal force acting on it. (in $N$)

• A. $0.0032$
• B. $0.0085$
  
• C. $0.00032$
  
• D. $0.0015$
  

Answer 1

The correct option is A $0.0032$

Given : $r=0.1m,$ $w=0.4rad/s$ and $m=0.2kg$

Centripetal force is given by

$F_c=m{\omega }^{2}r=0.2{\left(0.4\right)}^2\left(0.10\right)=0.0032m/s^2$