during a rockslide a 520kg rock slides from rest down a hillside that is 500m long and 300m high. The coeeficient of kinetic friction is 0.25. If the gravitational potential energy [tex]U[/tex] of the rock-earth system is zero at the bottom of the hill, what is the value of [tex]U[/tex] just beofre it slides?(adsbygoogle = window.adsbygoogle || []).push({});

I know this is wrong, but I tried:

[tex]U_g = mghcos \Theta[/tex]

[tex]U_g = 9.2 x 10^5J[/tex]

What do I do?

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# Homework Help: Conservation of Energy and calculating potential energy?

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