Question

If the frequency of the particle performing circular motion increases from 60 rmp to 180 rpm is 20 seconds, its angular acceleration is

• A. 0.1 $rad/s^2$
• B. 3.142 $rad/s^2$
• C. 0.6284 $rad/s^2$
• D. 0.3142 $rad/s^2$

Answer 1

The correct option is A 0.1 $rad/s^2$

Given that$,$
convert $60rpm$ into $1rad/s$
and convert $180rpm$ into $3rad/s$
thus a is equal to $3rad/s-1rad/s/20$
$=2/20$
$=1/10$
$=0.1rad/s^2$

Hence,

option $\left(A\right)$ is correct answer.