Question

1) Why friction a necessary evil? List out three advantages of friction.
2) Write two examples each of force as a
a) Push b) Pull
c) Squeeze​

Answer 1

Answer:

1)Frictional force causes a lot of losses in general upkeep and wear and tear of machinery. Hence it is considered as a evil. ... Basic activities like walking and writing on a surface are possible due to friction. Hence it is considered as a necessary evil.

the three advantages of friction are

Friction enables us to walk freely.

It helps to support ladder against wall.

It becomes possible to transfer one form of energy to another.

2) pushing a ball

Inserting a plug into a socket.

pulling a door

pulling a toy truck

squeezing a cloth

Explanation:

Answer 2

Answer:

Ans 1 is. friction force causes a lot of lossess in general upkeep and wear and tear in machunary but it also causes many advantages to us like

1. It helps us to walk freely
2. It helps to support ladder against wall.

2nd question is not clear to me

Sorry