The coefficient of kinetic friction between a suitcase and the floor is 0.272. You may want to review (Pages 196 - 203). Part A If the suitcase has a mass of 80.0 kg, how far can it be pushed across the level floor with 660 J of work

The work required to push will be equal to work done by friction. Let d be the displacement required.

force of friction = mg x μ where m is mass of the suitcase, μ be the coefficient of friction

work done by force of friction

mg x μ x d = 660

80 x 9.8 x. 272 x d = 660

d = 3.1 m.