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parkskier
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Homework Statement
A 120 g ball on a 60 cm long string is swung in a vertical circle about a point 200 cm above the floor. The string suddenly breaks when it is parallel to the ground and the ball is moving upward. The ball reaches a height of 650 cm above the floor. What was the tension in the string an instant before it broke?
Homework Equations
Vf^2-Vi^2=2aS
The Attempt at a Solution
I used the above equation to find the intial velocity when it breaks away from the string. Here's how I set that up:
(0)^2-(Vi)^2=2(-9.8)(.45)
This yielded: Vi= 2.969 m/s
Now my problem is how do I use this velocity to find the tension of the string just before it breaks?