A certain box is at rest on the floor while a rope is pulling to the right on the box with a force of 38 N and a rubber band is pulling to the left on the box with a force of 78 N.
If the rubber band breaks, then the friction force on the box will:
(select all correct answers below)
- be static friction
- be kinetic friction
- decrease in magnitude
- increase in magnitude
- change direction
would the object change in direction and decrease in magntidue? I know the friction woukdn't become kinetic friction, but will it be static friction? physics confuses me please help. thank you.
the net force from the rope and rubber band is 40 N to the left ... (78 - 38)
if the rubber band breaks, the net force becomes 38 N to the right
the frictional force was 40 N, so the new 38 N resultant won't move the box
frictional force is still static
... it decreases in magnitude
... it changes direction