Question

A wheel of radius $2$ metre is making $60$ revolutions per minute. Calculate the angular velocity of any point on the rim. (in $rad/s$)

• A. $2\pi$
• B. $3\pi$
• C. $4\pi$
• D. $\pi$

Answer 1

Answer: (A)

$2\pi$

The wheel makes $60$ revolutions in $60$sec means that it makes $1$ revolution in $1$sec.

Thus frequency of revolution $f=1rev/sec$

So, angular velocity $\omega =2\pi f=\left(2\pi \right)\left(1\right)rad/s=2\pi rad/s$