Question

Define friction force




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Answer 1

Answer:

The force that acts in the opposite direction of a moving body and is responsible to change its state of motion is called frictional force. It is a type of contact force.

Answer 2

Answer:

The force which opposes the motion of an object is called friction force

MORE TO KNOW -

• It is Contact force and always acts in the direction opposite of motion.

• Types of friction force-

i) Static

ii) Sliding

iii) Rolling

- Static friction occurs when an object just tend to come in motion.

- Sliding friction occurs when an object slide overs the surface.

- Rolling frction occurs when an object rolls over the surface.

Static > Sliding > Rolling

How friction is usefull ?

i) We are able to walk because of friction.

ii) Vehicles moved on road because of friction.

- More the irregularities in the surfaces, higher the friction.

- It can be slow down by smothning the surface.