Q. A particle moves in circle of radius 25 cm at the rate of two revolutions per second. The acceleration of particle is
A) $2\pi^{2}{ms}^{- 2}$
B) $4\pi^{2}{ms}^{- 2}$
C) $8\pi^{2}{ms}^{- 2}$
D) $\pi^{2}{ms}^{- 2}$
Explanation
(b) Acceleration of the particle is
$a = r\omega^{2} = r(2\pi n)^{2}$
$= 0.25 \times (2\pi \times {2)}^{2}$
$= {16\pi}^{2} \times 0.25$
${= 4\pi}^{2}\ {ms}^{- 2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.