Question

Look at the activities listed below. Reason out whether or not, work is done in the light of your understanding of the term work. 

1. Suma is swimming in a pond. 

2. A donkey is carrying a load on its back. 

3. A wind-mill lifting water from a well. 

4. A green plant is carrying out photosynthesis. 

5. An engine is pulling a train. 

6. Food grains are getting dried in the sun. 

7. A sail boat is moving due to wind energy.

Answer 1

1. Work is done because force is applied and the person is moved. 

2. No work is done the object is not moved in the direction of force. 

3. Work is done against gravitational force thrift water. 

4. No work is done 

5. Work is done since the engine is pulling the train. 

6. No work is done. 

7. Work is done because sail boat is moving in the direction of wind energy.