A 49 kg bear slides from rest 10 m down a lodgepole pine, Ask an Expert

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A 49 kg bear slides, from rest, 10 m down a lodgepole pine tree, moving with a speed of 3.8 m/s just before hitting the ground.

(a) What change occurs in the gravitational potential energy of the bear-Earth system during the slide?

(b) What is the kinetic energy of the bear just before hitting the ground?

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