Dynamics MCQs | Physics 9th Class Chapter 3 Objectives

Dynamics MCQs | Physics 9th Class Chapter 3 Objectives

Master Dynamics for Your Next Class 9th Physics Test!

This chapter comprehensively covers key topics like force, Newton's laws, inertia, weight, momentum, and collisions, etc. These MCQs are crucial for your online test prep and valuable for competitive exams like NTS, CSS, PMS, ETEA, KPPSC, PPSC, FPSC, and entry tests.

1. What downward force pulls a body towards Earth's center?

a) Mass

b) Acceleration

c) Weight

d) Momentum

2. What force compels a body to follow a curved path?

(a) Centripetal force

(b) Net force

(d) None of these

3. When an object rolls on a surface, what type of friction acts?

(a) Static friction

b) Kinetic friction

(c) Rolling friction

(d) None of the above

4. What physical quantity can cause a body to start, stop, or change its existing movement?

(a) Force

(b) Velocity

(d) Acceleration

5. What is the standard unit for measuring force in the International System of Units (SI)?

(a) Ohm

(b) Joule

(c) Newton

d) Pascal

6. When the net force (F-net) acting on a body is zero, the change in its velocity (ΔV) or its acceleration (a) is also zero. This statement represents which Newton's Law of Motion?

(a) First

(b) Second

(d) None of these

7. The mathematical formula representing Newton's second law of motion is:

(a) a = F*m

(b) F = ma

(d) F = m^2a^2

8. Which Newton's law is also known as the Law of Inertia?

(a) First

(b) Second

(d) First and Third

9. In the equation w = mg, what is the value of g, representing the acceleration due to gravity?

(a) 7.8 m/s

(b) 9.8 m/s²

(d) 8.9~m/s²

10. What physical quantity do we get when multiplying an object's mass (m) by its velocity (v)?

(a) Friction

(b) Velocity

(d) Momentum

11. When particles come close together and interact through forces, we call this phenomenon:

(a) Momentum

(b) Force

(c) Collision

(d) Weight

12. When an object moves, which type of friction opposes its motion in the opposite direction?

(a) Static Friction

(b) Kinetic Friction

(d) None of these

13. To reduce friction, which methods are effective?

(a) Polishing

(b) Applying lubricants

(d) All of these

14. Newton's law of Motion states that for every action, there is an equal and opposite reaction. Which law of motion is this statement describing?

a) First Law

b) Second Law

c) Third Law

d) None of these

15. The branch of physics that studies the effects of forces on motion is called:

a) Electrostatics

b) Electrodynamics (Correct)

c) Kinematics

d) Dynamics

Conclusion

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