Page 247 - New Medley 4 Semester 2 PDF (Merged)

Check Your Study

A. Tick () the correct answers.
1. A force can

(a) move an object (b) stop a moving object

(c) change the shape of an object (d) all of these

2. The electricity from falling water is produced in
(a) dams (b) hydropower stations

(c) rivers (d) factories

3. This is a simple machine.

(a) A pair of scissors (b) Bottle opener

(c) Pulley (d) All of these

B. Write True or False.
1. Force can change the shape of a body.

2. Work is done when force is applied.

3. It is easier to walk up a hill.

4. Coal is a renewable source of energy.

C. Identify the kind of force in each of the following cases.

1. The force used by a child in lifting a water bottle
2. The force that makes a mango fall on the ground

3. The force which causes a toy car to stop after some time

4. The force used by you while swimming

5. The force that makes a ball fall down after being thrown up

D. Answer these questions.

1. What is meant by a force?
2. What changes can a force make in an object?

3. Why do we need energy? Name four different forms of energy.

4. What are renewable sources of energy? Give three examples.

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