Question

A force of 5.00 N to the left causes a 1.35 kg book to have a net acceleration of 0.76 m/s2 to the left. What is the frictional force acting on the book?

Answer 1

F=ma
m=1.35
a=0.76
Force after friction
=1.35*0.76
=1.026 N

Force applied=5 N
Therefore frictional force
=5-1.026N
=?

Answer 2

3.974