Question

If a car is travelling at 20 m//s on a circular road of radius 400m then the radial acceleration will be
A. `1m//s^(2)`
B. `10m//s^(2)`
C. `0.1m//s^(2)`
D. `0.01 m//s^(2)`

Answer 1

Correct Answer - A
`a_(r)=(v^(2))/(2)=(20xx20)/(400)=1`.