Question

Sliding friction is ___________ than the static friction.

Answer 1

Static friction

1. The friction experienced when individuals try to move a stationary object on a surface, without actually triggering any relative motion between the body and the surface on which it is on.
2. Static friction is a force that keeps an object at rest.
3. The static frictional force is a self-regulating force, i.e. static friction will at all times be equivalent and opposite to the force applied.

Sliding friction

1. Sliding friction is the resistance force created between any two bodies when sliding against each other
2. Sliding friction is the friction that occurs when things slide across a surface.
3. The friction created by sliding can be beneficial. For example, when you write with a pen you use sliding friction. The "tip" of the pen glides over the paper with ease, but there is just enough friction between the pen and the paper to produce a mark.

Static friction v/s sliding friction

1. A body in motion experiences less friction as the surface irregularities are in contact for shorter periods of time. A body in motion tends to remain in motion due to inertia. Hence, sliding friction is less than static friction.
2. Static friction is stronger than sliding friction. That's why it's easier to move a piece of equipment across the floor once it's started moving rather than getting it rolling in the first place.

Sliding friction is less than static friction.