Question

A motor car is travelling at 40m/s on a circular road of radius 400m .it is increasing in speed at the rate of 2m/s^2 the accelerati on of the car is

Answer 1

There are 2 components of acceleration.

Towards center: V2/R = 40 x 40 /400 = 4 m/s2Tangent( orthogonal to center) = 3 m/s2Resultant of 1 and 2 above = 5 m/s2