- #1
pebbles
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Homework Statement
A 7.26 kg ball hangs from end of 2.5 m rope. The ball is pulled back until rope makes 45 degree angle with vertical. What is the gravitation potential energy?
Homework Equations
ug=mgh
The Attempt at a Solution
I thought I would just multiply mass times gravity times height, but the answer is 52 J.
What do I do with the angle I'm given?