Physics Class 9 Chapter 3: Dynamics - I

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• Class 9
• Physics
• Unit 3
• FBISE SSC-I

Chapter summary

Chapter 3 of Physics for Class 9 is called "Dynamics - I". It covers 19 learning outcomes of the Federal Board syllabus. You will learn to: illustrate that mass is a measure of the quantity of; explain that the mass of an object resists change from. Parhayi.com has 346 MCQs, 111 short questions and 19 long questions for this chapter.

Topics in this chapter

• Illustrate that mass is a measure of the quantity of…
• Explain that the mass of an object resists change from…
• Define and calculate weight…
• Define and calculate gravitational field strength…
• Differentiate between contact and noncontact forces
• Differentiate between different types of forces…
• State that there are three fundamental forces and…
• Represent the forces acting on a body using free body diagrams
• State and apply Newton’s first law
• Identify the effect of force on velocity…
• Determine the resultant of two or more forces acting…
• State and apply Newton's second law in terms of…
• State and apply Newton’s third law
• Explain with examples how Newton’s third law describes…
• State the limitations of Newton’s laws of motion.…
• Define and calculate momentum
• Define and calculate impulse…
• Apply the principle of the conservation of momentum to…
• Define resultant force in terms of momentum…

Sample questions

Try these questions from the chapter. The answers are for Premium students.

1. Differentiate between contact and non-contact forces. (3 marks)
2. Compare the strong nuclear force and the weak nuclear force (any three points). (3 marks)
3. A shopkeeper packs 3 packets of sugar of 750 g each and 2 packets of rice of 1.2 kg each in one bag. Find (a) the total mass of the goods in kg and (b) their total weight (g = 9.8 N/kg). (3 marks)

What Premium gives you in this chapter

• 346 MCQs with answers and explanations
• 111 short questions with full answers
• 19 long questions with answers
• 14 Learn cards
• 36 Activities and games
• chapter tests that show your weak topics

Physics explains how the world works, from motion and forces to heat, light and magnets. Learn each idea in simple steps, check the units, and practise numericals every day.