Question

A 30 kg object has a frictional force of 60 N. It's coefficient of friction must be...?

A) 0.2
B) 2
C) .002
D) 20

Answer 1

mass = 30kg

frictional force = coefficient of friction * (mass * g)

g = 9.8 m/s^2

So:

60N = x * 294 N

x = 60 N / 294 N = 0,2