(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

80kg mass man is swinging on a swing. His amplitude is 1m. in 60 seconds he does 15 swings. Find the potential and kinetic energy after 1/12 period.

2. Relevant equationsW(p)=mgh or kx^2/2 W(k)=mv^2/2 W(max)=Fr^2mg/2l

3. The attempt at a solutioni Found out that maximum energy is 100J. But when i am calculating energy of petencial or kinetic i get 1/3 or 2/3 of maximum...or something even more horrid. =]

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# Homework Help: Pendulum - energy

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