Q. A car moving with the speed of 10 m/s takes a circular turn of radius 20 m. The magnitude of the acceleration of the car is
A) $5.0\ {ms\ }^{- 2}$
B) $50.0\ {ms\ }^{- 2}$
C) $0.25\ {ms\ }^{- 2}$
D) $0.5\ {ms\ }^{- 2}$
Explanation
(a) $Centripetal\ acceleration = \frac{v^{2}}{r} = \frac{(10)^{2}}{20} = 5{m/s}^{2}\ $
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.