3rd Science Term 1 Unit 3 Force - Questions, Answers and Solution Guide

Force

Term 1 Chapter 3 | 3rd Science

Questions with Answers & Solutions

EVALUATION

I. Fill in the blanks with suitable words.

(Push, force, pull, speed, gravitational force, direction, Muscular)

1. A force is needed to make a stationary object move.

2. The force applied with the help of muscle is called Muscular force.

3. Push and pull are known as forces.

4. The reason for the fruits to fall from the tree is gravitational force.

5. Force changes the speed and direction.

II. Match the words with their pictures.

Observe the items below and match logically.

III. Answer the following questions.

Click on the question to reveal the answer.

1. How do you open the door?

I open the door by pushing or pulling.

2. Name the types of force.

There are two types of forces:

(1) Contact force
(2) Non-contact force.

Contact force is classified into three:
(1) Muscular force
(2) Mechanical force
(3) Frictional force

Non-Contact force is classified into two:
(1) Gravitational force
(2) Magnetic force.

3. Which force is involved in collecting water from well?

Muscular force is involved in collecting water from well.

4. What is push?

When a force is applied in the direction of an object, it is called push.

5. What kind of force is used to make clay pot?

Muscular force is used to make clay pot.

IV. Magnetic Attraction

Sujatha places a magnet near some objects. What are the objects that will be attracted from the list given below?

(note, pin, coin, rubber, shirt, comb, tumbler, nail)

Tap to see the attracted objects

Answer : pin, coin, nail.

V. Think and answer.

Raja throws a ball, a stone, a paper and a leaf up in the air? What kind of force is involved here? What will happen to them?

(1) Gravitational force is involved here.

(2) So the ball, the stone, the paper and the leaf will fall down. The earth pulls all the objects towards itself.

VI. Activity: Understanding Movement

Let us look at the pictures below to understand movement and action better.

The player hits the ball with hockey stick. Boys are riding bicycle.

In the above pictures, What moves?

The ball, The cycle.

What is the action?

Hitting the ball, Riding the bicycle.

VII. Identification Activity

Put a tick (✓) mark for the pictures of motion.

VIII. Classify the following - Push or Pull?

Think about the action before clicking to see if it is a Push or Pull.

1. Riding the bicycle

Push

2. Moving the table towards you

Pull

3. Dragging the chair

Pull

4. Moving a car to start

Push

5. Opening the window

Push

6. Stretching the rubber band

Pull

7. Removing the shoe laces

Pull

IX. Match the following

X. Visual Observation

Observe the picture and write the kind of force involved here.

XI. Identify Muscular Force

Tick (✓) the muscular force.

Think!

Why do we sprinkle powder on the carom board before playing carrom?

To reduce the friction between the surface of the carrom board, the striker and the coins.

Classifying Activities

Push Activities

(1) Swing

(2) Playing football

(3) Kids scooter, cycling

Pull Activities

(1) Pulling wood

(2) Pulling trolley

(3) Kiting

Friction Activities

(1) Sliding

(2) Playing in sand

(3) See saws