MCQ Newton’s First 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. In experiments using a pair of inclined planes facing each other, Galileo said that when a marble is released from a height along the left of a double inclined plane, it would:

Would roll down and rise to a lesser height on the opposite side.

Would roll down and stay at the bottom of the inclined plane.

Would roll down and rise to a greater height on the opposite side.

Would roll down the slope and rise to the same height on the opposite side.

Question 1 of 14

2. The people in a bus are pushed backwards when the bus starts suddenly because of:

Inertia due to direction

External force

Inertia due to motion

Inertia due to rest

Question 2 of 14

3. Between a football and stone of same size, the inertia of:

Football is greater.

Stone is greater.

Both the objects is equal.

None of the above.

Question 3 of 14

4. If A and B are two bodies of masses 20kg and 40kg respectively, then:

A and B have same inertia.

B has more inertia than A.

They will not have any inertia.

A has more inertia than B.

Question 4 of 14

5. While dusting a carpet we beat it with a stick because:

Force applied on the carpet.

No inertia is involved.

Inertia of motion removes the dust.

Inertia of rest keeps the dust in its position.

Question 5 of 14

6. If no external force acts on a moving object:

It will not be affected at all.

It will continue to move with the same speed in the same straight line.

It will stop moving.

It will remain at rest forever.

Question 6 of 14

7. A rocket sitting on a launch pad demonstrates which of Newton's laws?

Third law of motion.

First law of motion.

Newton's law of angular momentum.

Second law of motion.

Question 7 of 14

8. Which of the following will have the largest inertia?

A pencil box

A pin

A book

A car

Question 8 of 14

9. Newton's first law of motion is also known as:

Law of momentum.

Law of acceleration.

Law of inertia.

Law of impulse.

Question 9 of 14

10. When a car stops suddenly we fall forwards, this is because:

Our body tends to continue to be in motion due to inertia.

Of a reaction force.

Of momentum.

Centripetal force.

Question 10 of 14

11. Assertion-A small child pushes heavy box, but it cannot move easily.

Reason-when box is heavy it cannot move from one place to another place.

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-A small child push heavy box, but it cannot move easily.

Reason-when the friction force balances pushing force at that time heavy box cannot move by small force.

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 12 of 14

13. Assertion-An object moves with a uniform velocity when the forces acting on the object are balanced and there is no net external force on it.

Reason- External force on velocity is always negative.

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 13 of 14

14. Assertion : A quick collision between two bodies is more violent than a slow collision, even when the initial and the final velocities are identical.
Reason : Because the rate of change of momentum which determines the force is greater in the first case.

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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