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Exercise Short Answer Questions
Complete set of exercise short questions with exact exam-ready answers. Covers torque, center of mass, couple, equilibrium conditions, and stability.
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Short Answer Questions
Important short questions with concise answers. Covers torque, moment arm, center of mass, couple, equilibrium conditions, and stability types.
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Comprehensive Questions
Detailed long-answer questions with complete explanations. Covers torque derivation, center of mass calculation, equilibrium conditions, and stability applications.
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Numerical Problems
Step-by-step solutions for torque calculations, equilibrium problems, center of mass, and couple moment problems with complete derivations.
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Multiple Choice Questions
Comprehensive MCQs covering torque, moment arm, center of mass, couple, equilibrium conditions, stability types, and practical applications.
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Constructed Response Questions
Open-ended questions for deeper learning and critical thinking. Covers torque applications, equilibrium analysis, center of mass determination, and stability concepts.
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⚡ Key Formulas – Turning Effect of Forces
\[ \tau = F \times d \]
Torque (Moment of Force)
Torque (Moment of Force)
\[ \sum \tau = 0 \]
First Condition of Equilibrium
First Condition of Equilibrium
\[ \sum F = 0 \]
Second Condition of Equilibrium
Second Condition of Equilibrium
\[ \tau_{cw} = \tau_{ccw} \]
Clockwise vs Anti-clockwise Torque
Clockwise vs Anti-clockwise Torque
\[ \text{Center of Mass} \]
Point where whole mass is concentrated
Point where whole mass is concentrated
\[ \text{Couple} \]
Two equal and opposite parallel forces
Two equal and opposite parallel forces
Chapter 1Physical Quantities and Measurements
Chapter 2Kinematics
Chapter 3Dynamics
Chapter 4✨ Turning Effect of Forces
Chapter 5Work and Energy
Chapter 6Mechanical Properties of Matter
Chapter 7Thermal Properties of Matter
Chapter 8Magnetism
Chapter 9Nature of Science
📖 Complete syllabus coverage for Class 9 Physics (PECTAA 2026) – Chapters 1 to 9
Created by Hira Science Academy | Aligned with PECTAA 2026 Syllabus