Question

You need to move a 105kg sofa to a diffrent room. It takes a force of 102 N to start it moving. What is the coefficient of static friction between sofa and carpet?

Answer 1

for \[\sum Fy=ma \]
=N-mg=0
N=105 * 9.81
=????

then
\[\sum Fx=ma\]
F-f =0
\[F=uN\]
\[ 102N=(105*9.81)u\]
\[u=???? \]