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Dynamics: 9th Class Physics Chapter 3 MCQs

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Here is a post which contains 9th Class Physics Chapter 3 MCQs. This post belongs to chapter wise notes of Physics for Class 9. Name of the 3rd chapter in Class 9 Textbook is “Dynamics“. Class 9 Physics MCQs Chapterwise are also availalbe. Students can practice these Multiple Choice Questions during the preparation for Exams. However, students should use other sources to get more Objective type questions as well. I have taken these Class 9 Physics Chapter 3 Dynamics Solved MCQs from Al-Hassan Super Notes Physics (English Medium) – IX. In my openion students should go through Dynamics MCQs Chapter 3 before taking exams. You will find these 9th Class Physics Chapter 3 Solved MCQs as quiz.

Class 9 Physics Chapter 3 Dynamics MCQs with Answers

You may also like: Chapter 3 Dynamics Short Questions and Numericals

1. Product of mass and velocity of a body is called ___________.

(a) Torque
(b) Force
(c) Work
(d) Momentum

(d) Momentum

2. A string is stretched by two equal and opposite forces 10N each. The tension in the string is ___________.

(a) 10N
(b) 5N
(c) Zero
(d) 20N

(a) 10N

3. The unit of momentum is ___________.

(a) Nm
(b) Kgms-²
(c) Ns-¹
(d) Ns

(d) Ns

4. Newton’s first law of motion is valid only in the absence of ___________.

(a) Force
(b) Net Force
(c) Friction
(d) Momentum

(c) Friction

5. Which of the following materials lowers friction when pushed between metal plates:

(a) Water
(b) Fine marble powder
(c) Air
(d) Oil

(d) Oil

6. Inertia depends upon ___________.

(a) Force
(b) Net force
(c) Mass
(d) Velocity

(c) Mass 

7. in the isolated system the momentum after the collision of two bodies is ___________.

(a) Increases
(b) Constant
(c) Decreases
(d) Zero

(b) Constant

8. The coefficient of friction µs between the tyre and wet roads is ___________.

(a) 0.2
(b) 0.6
(c) 0.8
(d) 1

(a) 0.2 

9. Coefficient of friction between tyre and dry road is ____________.

(a) 0.6
(b) 1
(c) 0.05
(d) 0.2

(b) 1 

10. One Newton is equal to ___________.

(a) kgms-¹
(b) Kgms-²
(c) Kgms-²s
(d) kgms-¹s-¹

(b) Kgms-² 

11. A Train is moving at a speed of 36 kmh-¹. Its speed expressed in ms-¹ is________.

(a) 10ms-¹
(b) 20 ms-¹
(c) 25ms-¹
(d) 30ms-¹

(a) 10ms-¹ 

12. Centripetal force always acts ________ to the motion of the body.

(a) Opposite
(b) Parallel
(c) Perpendicular
(d) Upwards

(c) Perpendicular 

13. Rate of change of momentum is called _________.

(a) Torque
(b) Distance
(c) Force
(d) Mass

(c) Force 

Check Also

  1. 9th Physics Chapter 1 Physical Quantities and Measurement MCQs
  2. Class 9 Physics Chapter 2 Kinematics MCQs
  3. Class 9 Physics Chapter 4 Turning Effect of Forces MCQs
  4. 9th Physics Chapter 5 Gravitation MCQs
  5. Class 9 Physics Chapter 6 Work and Energy MCQs
  6. 9th Physics Chapter 7 Properties of Matter MCQs

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2 Comments

  1. M.ali

    February 26, 2022 at 10:11 am

    Please correct MCQ no 2
    The tension in the string is 10 N not 20 because
    You see, it doesn’t matter whether the string is tied to a wall *or an equal and opposite force is applied to keep the forces in balance. In both cases, the tension in the string is the same. So the tension in the string is 10N.*

    Reply

    • admin

      February 26, 2022 at 10:29 am

      Checked, Modified and Updated… Thank you!

      Reply

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