Question

Which of these statements describe friction? Check all that apply.

Friction allows objects to slide over each other without any resistance.
Friction resists motion.
Friction is a force that acts from a distance.
Friction is a contact force.
Friction is caused by microscopic bumps and ridges on surfaces.

Answer 1

Answer:

friction is a contact force that is applied to move or stop something

Answer 2

Among the following, the statements that describe friction are:    

1. Friction resists motion,

2. Friction is a contact force and

3. Friction is caused by microscopic bumps and ridges on the surface.

• An object that moves over a surface will experience a force that resists its motion. This is the frictional force.
• For such a force to act, the object has to be in contact with the surface over which it moves. Hence, this is a contact force.
• This is a force that causes obstruction in the smooth movement of the object.
• Friction increases as the area of contact increases.
• Also rougher the surface, the greater the friction.
• Surfaces with bumps and ridges are rough and hence, greater the friction.