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What is the tangential speed of the ball?

  • Thread starter Smessy
  • Start date
  • #1
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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.
 

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Answers and Replies

  • #2
Doc Al
Mentor
44,940
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Start by analyzing the forces that act on the ball. Apply Newton's 2nd law. Is the ball accelerating?
 
  • #3
106
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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.
 

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