Conceptual Questions | Chapter#3 Dynamics-I | Physics 9th | New Book| National Book Foundation |

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Respected Teachers and Dear Students..!
9th Physics New Book National Foundation for Federal Board

Conceptual Questions:

Q#1: State first law of motion. Explain with the help of examples. Why is it called law of inertia?
Ans: Newton's First Law of Motion:
   • Introduction Newton's First Law of Mo...  

Q#2: Define inertia. Why is it important to have knowledge of inertia in our daily life? Elaborate your answer with examples.

Q#3: State and prove Newton’s second law of motion. Deduce Newton’s second law of motion from its first law?
Ans: Newton’s second law of motion
   • Newton's Second Law of motion || Ch#3...  

Q#4: State Newton’s 3rd law of motion. Explain with examples from daily life.
Ans: Newton’s 3rd law of motion
   • Newton's Third Law of Motion || CH#3 ...  

Q#5: State the limitations of Newton’s laws of motion.
Ans: Limitations of Newton’s laws of motion
   • Newton's Third Law of Motion || CH#3 ...  

Q#6: Differentiate with examples between contact and non-contact forces.
   • Types of Forces || IX Physics Ch#3 Dy...  

Also, explain fundamental forces and the role of Dr. Abdus Salam from Pakistan in unifying two fundamental forces.
   • Fundamental Particles in Universe || ...  


Q#7: Represent the forces acting on a body using free body diagrams.
   • Force Diagram and Net Force || 9th Ph...  

Q#8: Define momentum. What is its formula and unit? Is it a scalar or vector quantity? Show that units of momentum, Ns and kgm/s are equal.
   • Impulse Force & Momentum in Physics |...  

Q#9: Differentiate between mass and weight of body.
   • Mass and Weight || 9th Physics ch#3 D...  

Q#10: What are gravitational field strength? Explain.
   • Gravitational Field || CH#3 Dynamics-...  

Q#11: Justify and illustrate the use of electronic balances to measure mass.

Q#12: State and prove Newton’s second law of motion in term of momentum.
   • Impulse Force & Momentum in Physics |...  

Q#13: Define Isolated System. State law of Conservation of linear momentum. Explain with example.
   • Law of Conservation of Momentum || Ch...  

CH#3 Dynamics Exercise MCQs Solution Video Link:
   • Multiple Choice Questions || ch#3 Dyn...  

CH#3 Dynamics Exercise Short Questions Solution Video Link:
   • Solved Exercise Short Questions || Ch...  

CH#3 Dynamics Exercise Numerical Problems Solution Video Link:
   • Numerical Problem Solutions | Chapter...  

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