A stone of mass 2.5 kg lies on a roof 7 m above the ground.
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A stone of mass lies on a roof above the ground. What is its potential energy, measured from the ground? ()
Need a reminder? The key ideaShow
Potential energy , with measured from a level we choose. The change in between two heights is the same from any level, and it does not depend on the path.
The worked solution
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Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, compare your working with the solution.
Step 1. .
Answer: .
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