Newton’s First Law of Motion, Class 9 Science

1. There will be total 10 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 10

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 10

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 10

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 10

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 10

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 10

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 10

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

 A pencil box

 A pin

 A book

  A car

Question 8 of 10

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 10

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 10

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