You are helping your friend move a new refrigerator into his kitchen. You apply a horizontal force of
F =+214i - 171k N
to try and move the 64.0-kg refrigerator. The coefficient of static friction is 0.660.
(a) How much static frictional force does the floor exert on the refrigerator? Express your answer in vector form.
(b) What magnitude of maximum force do you need to apply before the refrigerator starts to move?