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5. An object is moving along a straight line on a horizontal surface. The weight of the object is 50 N The initial kinetic energy of the object is 100 J. The kinetic friction force is 25 N. Due to the friction the object comes to a stop. Refer to the figure for problem 5. 15) What is the work done by the friction force? a) -200 J a) -200 J A) o, 5 b) 0 J c) 100 J c) 100 J )0. 2 4) 4m 16) What is the work done by the normal force? d) -100 J d) -100 J d) 0,3 b) 0 J 17) What is the coefficient of kinetic friction? 16) what is the Stopping distanu A) 2 m b) lo m d) 6 m
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iueHc worn a (c 2s 100 dt

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