Question

A box of mass m and initial speed v0 slides distance d across a horizontal floor before coming to rest. Use work and energy to find an expression for the coefficient of kinetic friction.Express your answer in terms of the variables v0, d, and free fall acceleration g.

Answer 1

F = mu m g

work = F d = mu m g d
Ke lost = (1/2) m Vo^2

Vo^2 = 2 mu g d

mu = Vo^2/(2gd)