A 200 N force is used to push a 150kg frig across a level floor for a distance of 10m at constant velocity. What is the coefficient of kinetic friction?

Answer 1

QUESTION:

A 200 N force is used to push a 150kg frig across a level floor for a distance of 10m at constant velocity. What is the coefficient of kinetic friction?

GIVEN:

F = 200 N

m = 150 kg

v = constant

x = 10 m

UNKNOWNS:

µ_kinetic = µ_k = ?

EQUATION:

F = µmg

SOLVE:

µ = F/mg

SUBSTITUTE:

µ = 200 N / (150 kg * 9.81 m/s^2)

= 0.1359

THEREFORE, the kinetic coefficient of friction is 0.14 (µ_k = 0.14)