Question

A cycle wheel of radius $0.4m$ completes one revolution in one second, then the acceleration of the cycle will be

• A. $0.8m/s^2$
• B. $3.9m/s^2$
• C. $1.6{\pi }^{2}m/s^2$
• D. $0.4{\pi }^{2}m/s^2$

Answer 1

The correct option is B $3.9m/s^2$

$\omega =2\pi \times f$

$\omega =2\pi \times \frac{\pi }{2}=\pi$

$a_r={\omega }^2\times r$

$={\pi }^2\times r$

= $3.9m/s^2$

Hence,

option $B$ is correct answer.