Can you help me with this science question?

Question

Is friction always a net force? Can you think of an example where friction applies a force but does not result in accleration?

Answer 1

Friction is not always a net force is by net you mean the resultant of a vector sum of forces. Friction is due to two surfaces moving against each other. It can act opposite another force and result in no net force being applied to a body. A good example is a box pulled along the ground at constant speed. Since ther eis no acceleration, there is no net force, yet there is a force due to friction and a force due to whoever is doing the pulling.