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C. State whether the following statements are true or false:
1. Friction is an opposing force which slows down the motion of an object. ______

2. Lever is used to push things. ______
3. Screw is used to join things. ______

4. Machines do not help in making our work easier. ______

D. Give one word for the following:

1. If we throw a ball upwards, it falls down. It is called ____________
2. Machine used to cut things apart is called ____________

3. The ultimate source of energy is ____________
4. Energy which is renewed easily and does not get used up is ____________

E. Short Answer Questions.
1. Write about different types of force.

2. What is work?
3. Write an example of friction force.

4. What is renewable energy?

F. Long Answer Questions.

1. Define different sources of energy.
2. Write about gravitational force with an example.

3. Explain different types of machines.
4. Explain three types of forces with examples.

G. Look at the pictures and write the source of their energy.

____________________ ____________________ ____________________

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