During a rockslide a 760 kg rockslides from rest down a


During a rockslide, a 760 kg rockslides from rest down a hillside that is 500 m long and 300 m high. The coefficient of kinetic friction between the rock and the hillsurface is 0.34.

(a) If the gravitational potential energy U ofthe rock-Earth system is set to zero at the bottom of the hill,what is the value of U just before the slide?

J

(b) How much energy is transferred to thermal energy during theslide?

J

(c) What is the kinetic energy of the rock as it reaches the bottomof the hill?

J

(d) What is its speed then?

m/s

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Physics: During a rockslide a 760 kg rockslides from rest down a
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