What is the tangential speed of the ball?

[Smessy]

Homework Statement

A 0.700 kg ball is on the end of a rope that is 0.60 m in length. The ball and rope are attached to a pole and the entire apparatus, including the pole, rotates about the pole's symmetry axis. The rope makes an angle of 70.0° with respect to the vertical as shown. What is the tangential speed of the ball?
? m/s

Homework Equations

v=rw

The Attempt at a Solution

I know that in order to solve this problem I need to find time, but I'm not sure how to do that. I know that I need time to be abel to find w and that r=0.60m I think. Any help would be great. Thank you. There is a picture that is attached to help with the problem.

 

[Doc Al]

Start by analyzing the forces that act on the ball. Apply Newton's 2nd law. Is the ball accelerating?

 

[atavistic]

It has centripetal acceleration.Break the forces acting into components.You will get relation of T,and another relation with centripetal acc.Equate and u will get V.