Suppose that you shove an object so that it continues to slide (for a little while) across a level floor even after you have stopped pushing, but eventually it comes to a stop due to friction. (Assume there is no air resistance.) While it is sliding across the floor (and AFTER you have stopped pushing),
A)the force left over from your push must be greater than the force of friction
B) the net force on the object is the force of friction
C)the net force is zero
D)the net force must be twice the object’s weight
E) none of these is true
I thought that it would've been A because for it to keep on going, the force has to be greater than the force of friction, but turns out that is wrong. Would it have to be D then?? Or maybe it's B because then that could explain why it's slowing down since friction is acting against the object.
The only HORIZONTAL force on the object is friction so B is probably the desired answer.
I have a gripe with that because gravity is pushing down and the floor is pushing up.