posted by bob on .
a 60 kilogram student sitting on a hardwood floor accelerates at 1.3 meters per second squared when pulled by a 240 newton horizontal force. what is the coefficient of friction between the student and the floor?
The net accelerating force is F = M a = 78 N. That means the friction force is
Ff = 240 - 78 = 162 N
The coefficient of friction is
(162 N)/(M*g) = ___