Originally Posted by **vaDi999** A body is moving on a circle of radius 80m with a speed of 20m/s which is decreasing at the rate 5 m/sec^2 at an instant. The angle made by its acceleration with its velocity is ?
Tangential acceleration = 5 m/s^2
Centripetal acceleration = v^2 / r = 5
Angle btw them alpha = 45 degree
How do I find angle btw omega and centripetal acceleration ?? |

Hint: $\displaystyle v = r \omega$ where v is the tangential speed, which you were given. Can you think of a relationship between a and $\displaystyle \alpha$?

-Dan