Question

examples to show that friction is a friend or foe

Answer 1

friction :
as a friend:- 1) friction helps us to walk
                  2) due to friction we are able to ride any vehicle.
                  3) it helps us to hold things.
if their will be no friction then we will slip out .
as a foe:- 1) friction removes our shoe soles.
               2) friction damages the internal part of vehicles. like for example:- if oil is not provided to our bicycles it makes it hard to paddle the bicycle and also makes noises.
               3) a large amount of heat energy is lost when two objects rub each other.
                               i hope that this will help u.................^_^

Answer 2

Friction can be both friend and foe.
FRIEND:
1 It helps in construction of buildings.
2 It helps in walking on the ground.
3.it helps in placing an object at one place     .
4.cars and automobiles move on the ground due to friction
FOE:
1 soles of shoe and tyres of vehicles wear out due to friction.
2 friction can also produce heat. so it can damage the machines.
3.friction is un desirabe in machinary as it is the cause of wearing out of parts
4. It causes wastage of energy

thank Q !
hope helped u dear frnd !!