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Mechanical Energy

  • Thread starter norcal
  • Start date
  • #1
19
0

Homework Statement



A thin rod, of length L and negligible mass, that can pivot about one end to rotate in a vertical circle. A heavy ball of mass m is attached to the other end. The rod is pulled aside through an angle and released.
What is the speed of the ball at the lowest point if L = 2.20 m, = 19.0°, and m = 500 kg?

Homework Equations



W=mgd(cos theta)
KE=(1/2)mv^2

The Attempt at a Solution



How do I get the velocity? Can I get it by using the above equations if I solve for W? Where do I plug the answer for W in to find the velocity?
 

Answers and Replies

  • #2
5,428
291
Do you know what W is as defined in your post ? Can you give it a name ?
 
  • #3
19
0
W=work done
 

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