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Mechanics: Collision, friction, work, energy,

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A movie stuntman (mass = 80.0 kg) stands on a window ledge 5.0 m above the floor (see figure below.) Grabbing a rope attached to a chandelier, he swings down to grapple with the movie's villain (mass = 70.0 kg) who is standing directly under the chandelier. (Assume that the stuntman's center of mass moves downward 5.0 m.)

(a) With what speed do the entwined foes start to slide across the floor?

(b) If the coefficient of kinetic friction of their bodies with the floor is µk = 0.250, how far do they slide? List all physics principle(s) used in your calculation.

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https://brainmass.com/physics/work/mechanics-collision-friction-work-energy-282194

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Problem related to work, energy, collision and friction is solved.

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