Question

what causes friction between two surfaces in contact?

Answer 1

Friction is caused by the interlocking between the two surfaces. Friction acts always opposite to the applied force,it is force of friction.

Answer 2

Answer:

Friction is caused due to the interlock of the molecules between the surfaces that are in contact.

Explanation:

Friction is caused due to the irregularities on the two surfaces in contact.

The surface whether smooth or rough, there will be some irregularities between the surfaces in contact.

Friction is the force that opposes the motion of an object.

There are mainly four types of friction: static friction, sliding friction, rolling friction, and fluid friction.

Methods to reduce friction

• To reduce friction we can make the surfaces in contact smooth.
• Also adding a lubricant to two surfaces in contact reduces friction between them.
• A grease is added between the moving parts in machines, to reduce friction.
• Another method of reducing friction is by using bearings.

Methods of increasing friction

• To increase friction, Spikes are provided in the soles of shoes worn by players and athletes.
• This prevents the slipping of players or athletes on running.
• Spikes are the pointed nails which get into the ground and increase friction between shoe and the ground.