Hello Siddharth, friction is the force that resist motion in the surface of an object comes in contact with the surface of another.The mechanical advantage of a machine is reduced by friction or in other words the ratio of output to input is reduced because of friction.

Example:-

1. a person sliding down a slide is an example of sliding friction

2. One example of static friction is that help the people climb the rock wall

Hello Siddharth,

The opposing force which comes into play when an body moves or tries to move the surface of another body is known as friction.

Example:t is impossible to walk on the ground without friction. Friction is what holds your shoe to the ground. The friction present on the ice is very little, this is the reason why it is hard to walk on the slippery surface of the ice.

Hello aspirant,

When a body is in motion , a force which opposes its motions is called Friction

Friction acts as a resisting force which is generated , when two solid surfaces slide against one another.

Examples :-

<> For walking , there is a friction between our shoes / feet .

<>There is a friction between the tires of a vehicle and between the road


I hope it was helpful!
Thankyou!