A horizontal force drags a box across a floor. If another force of the same magnitude but an angle above the horizontal is applied, the force of kinetic friction

become greater
become smaller
remain the same
none of the above

Question

A horizontal force drags a box across a floor. If another force of the same magnitude but an angle above the horizontal is applied, the force of kinetic friction

become greater
become smaller
remain the same
none of the above

anonymous · Answer

Remains the same, I think. As long as the surfaces are the same, the force of kinetic friction will stay constant. The additional force may make it easier on the horizontal force to pull the box, but the friction will not change.