Question

1)In what way are modern methods of irrigaton beeer than the traditonal ones?

2)Is fricton a necessary evil? Justfy .​

Answer 1

Answer:

1) Modern methods of irrigation are better than the traditional ones as they require less time and labour. Also, they water the plant more evenly.

2) Yes, friction is a necessary evil.

• It is a friend because -

» It helps us to walk easily.

» A car can move on a road because of friction.

» It helps us to write something on a blackboard or paper.

» We are able to sit on a chair because there is friction between us and the chair.

• It is an evil because -

» Soles of shoes wear and tear due to friction.

» Moving parts of machine consume more fuel due to friction, which is a money loss.

» We need energy to overcome the force of friction.

» Heat energy is generated due to friction, which is loss of energy.

Answer 2

1) Modern methods of irrigation are better than the traditional ones as they require less time and labour. Also, they water the plant more evenly.

2) Yes, friction is a necessary evil.

• It is a friend because -

» It helps us to walk easily.

» A car can move on a road because of friction.

» It helps us to write something on a blackboard or paper.

» We are able to sit on a chair because there is friction between us and the chair.

• It is an evil because -

» Soles of shoes wear and tear due to friction.

» Moving parts of machine consume more fuel due to friction, which is a money loss.

» We need energy to overcome the force of friction.

» Heat energy is generated due to friction, which is loss of energy.

$\:$