Question
A body is moving on a circle of radius 80m with a speed 20m/s which is decreasing at the rate of 5m/s2 at an istant. What is the angle made by its acceleration with its velocity?
Joshi sir comment
You should write that calculate
What is the angle made by its acceleration with its velocity at the instant for which conditions are given.
solution
centripetal acceleration = 20*20/80 = 5 m/s2
tangential acceleration = 5 m/s2
so angle = tan-1(5/5) = 450