MCQ Newton’s Third Law of Motion Chapter 9 Class 9 Science

MCQ’s For All Chapters – Science Class 9th

1. There will be total 14 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. A child on a cart with wheels throws a sandbag forward. As a result:

He moves to the left.

He moves backward.

He moves forward.

He moves to the right.

Your comments:

Question 1 of 14

2. When a fireman directs a powerful stream of water from a hose-pipe, the hose-pipe tends to go backward. This is due to:

Law of Inertia.

Newton’s 3^rd law.

Law of conservation of charges.

Law of conservation of energy.

Your comments:

Question 2 of 14

3. Which among the following is true as per Newton's third law:

Action and reaction forces are always equal and opposite.

Action and reaction forces are always perpendicular.

Action and reaction forces are always unequal.

Action and reaction forces act in same direction.

Your comments:

Question 3 of 14

4. A person standing on a weighing scale sees a reading on the scale as 148 pounds. This person is acted on by

No forces at all.

Two forces of equal magnitude acting in opposite directions.

Only one force of 148 pounds, as shown by the reading on the scale.

Only one force, of 296 pounds (= 2 × 148 pounds)

Your comments:

Question 4 of 14

5. An archer shoots an arrow. Consider the action force to be the bow string against the arrow. The reaction force is the:

Arrow pushing against bow string.

Air resistance against the bow.

Weight of the arrow.

Grip of the archer''s hand on the bow.

Your comments:

Question 5 of 14

6. Two spring balances pull each other in opposite directions. If the reading of one spring balance is 2 N, the reading shown by the second spring balance will be:

2.5 N

3.5 N

3.0 N

2.0 N

Your comments:

Question 6 of 14

7. Which one is correct if a bullet is fired from a rifle?

There is no motion of bullet and rifle.

Rifle moves in backward direction and bullet moves in forward direction.

Bullet and rifle both move in backward direction.

Bullet moves in backward direction and rifle moves in forward direction.

Your comments:

Question 7 of 14

8. Which is incorrect statement about action and reaction forces:

They act on different objects.

They are equal.

They are opposite.

They act on same object.

Your comments:

Question 8 of 14

9. A player is catching a ball. Consider the action force to be the impact of the ball against the player's glove. What is the reaction force?

Force that the glove exerts on the ball.

The players grip on the ball.

Friction of the ground.

The muscular effort in the player's arm.

Your comments:

Question 9 of 14

10. Assertion-Practically there is difficulty seen for achieving zero unbalanced force.

Reason-The presence of frictional force acting opposite to the direction of motion hence unbalanced force is difficult.

a) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c) Assertion is true but Reason is false.

d) Both Assertion and Reason are false.

Question 10 of 14

11. Assertion- Practically there is difficulty seen for achieving zero balanced force.

Reason- Zero unbalanced force is only achieved in vacuum chamber.

a) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c) Assertion is true but Reason is false.

d) Both Assertion and Reason are false.

Question 11 of 14

12. Assertion- To every action there is an equal and opposite reaction which happens in two different bodies.
Reason- Friction is nothing but force which always opposes motion of objects.

a.) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b.) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c.) Assertion is true but Reason is false.

d.) Assertion is false but Reason is true.

Question 12 of 14

13. Assertion- Thermos flasks help us to maintain tea temperature.
Reason- In an isolated system the total energy or heat remains conserved.

a.) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b.) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c.) Assertion is true but Reason is false.

d.) Assertion is false but Reason is true.

Question 13 of 14

14. Assertion : Newton’s third law applies to all types of forces. e.g. gravitational, electric or magnetic forces etc.
Reason : Newton’s third law of motion is applicable only when bodies are in motion.

a.) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b.) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c.) Assertion is true but Reason is false.

d.) Assertion is false but Reason is true.

Question 14 of 14

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