Problem: A 5 kg mass is pushed across a floor with a coefficient of kinetic friction of 0.35. If the force pushing the mass is 70 N, how much work is done after 5 s by:(a) the pushing force(b) friction after(c) the normal force(d) gravity

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A 5 kg mass is pushed across a floor with a coefficient of kinetic friction of 0.35. If the force pushing the mass is 70 N, how much work is done after 5 s by:
(a) the pushing force
(b) friction after
(c) the normal force
(d) gravity

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Based on our data, we think this problem is relevant for Professor Kusenko's class at UCLA.