Download Class 9 Chapter 6 Physics Exercise Short Questions PDF for quick revision and exam preparation. This PDF is helpful for 9th class students who want to prepare important exercise short questions according to the new syllabus. Students can use it to revise chapter-wise questions, improve their concepts, and prepare better for school tests and board exams.
Chapter 6 Short Questions: Mechanical Properties of Matter
These are the exercise short questions from Chapter 6 of the Class 9 Physics textbook. In this chapter you are expected to be able to state, from memory and in two or three lines:
- Density, its formula and its SI unit.
- Pressure, its formula, and why it depends on area.
- Pascal law and one application of it.
- Archimedes principle, and the condition for floating.
- Hooke law, and the meaning of the elastic limit.
- Stress, strain, and what Young modulus measures.
Wording That Costs Marks in This Chapter
Short answers in Mechanical Properties of Matter are marked on precision rather than length. These are the specific slips that lose marks here:
- Defining pressure as force without dividing by area.
- Stating Archimedes principle without mentioning the weight of fluid displaced.
- Confusing stress with strain, or giving strain a unit when it has none.
Working Through the Set
Cover the answer, write your own version, then compare. Recognising a correct answer is not the same as producing one, and only writing exposes the difference. Mark yourself as strictly as an examiner would: if the unit is missing, count the mark as lost. Come back to anything you got wrong two days later rather than the same evening.
Frequently Asked Questions
What does Young modulus measure?
The stiffness of a material. It is the ratio of stress to strain within the elastic limit, so a large value means the material resists being stretched.
Is this PDF free and based on the new syllabus?
Yes to both. It is free with no sign-up, and it follows the current Class 9 Physics textbook, in which Mechanical Properties of Matter is Chapter 6 of nine.
Related Class 9 Physics Resources
For the reasoning answers from the same chapter see the Chapter 6 constructive questions, and test yourself with the Chapter 6 online test. Continue with Chapter 5 and Chapter 7, or sit a full paper from the 25 Class 9 Physics guess papers. Everything else is on the Class 9 Physics page.