Question

A car whose radius of tire is 30 cm is travelling at a speed of 54 km/h on a straight road. Find angular speed of tire(assume there is no slipping between tire & road).

• A. 20 rad/sec
• B. 180 rad/sec
• C. 50 rad/sec
• D. 10 rad/sec

Answer 1

The correct option is C 50 rad/sec

For no slipping,
$\omega =\frac{v}{r}=\frac{54\times \frac{5}{18}}{0.3}$
$=\frac{150}{3}=50rad/sec$