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A loaded 375 kg toboggan is traveling on smooth horizontal snow at 4.50 m/s when it suddenly comes to a rough region. The region is 5.40 mlong and reduces the toboggan's speed by 1.20 m/s .

a) What average friction force did the rough region exert on the toboggan?

b) By what percent did the rough region reduce the toboggan's kinetic energy?

c) By what percent did the rough region reduce the toboggan's speed?

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