hi, is this question wrong or am i wrong?
A crate of mass 100 kg rests on a rough horizontal factory floor. The coefficient of friction between the floor and the crate is 1/7. A storeman applies a horizontal force of F newtons to the crate in order to move it to a different location.
Gravity is 9.8 ms^-2
a) Show that if F = 120, the crate will not move.
Now, for the crate not to move, doesnt F == Friction ? If so, i got Fr = 140, not 120.
F = mu * R = 1/7* 100g = 140
So whats wrong?