CBSE Class 9 Science – Force and Laws of Motion

CBSE Class 9 Science – Force and Laws of Motion

Study Materials

9th

Science (EVS)

Force and Laws of Motion

Chapter Overview

This chapter introduces the concept of force and its effects on objects. It explains Newton's three laws of motion, inertia, momentum, and their applications in everyday life. The chapter also covers the mathematical derivation of force and its implications in physical interactions.

Important Keywords

  • Force: A push or pull that changes the state of motion or shape of an object.
  • Inertia: The tendency of an object to resist changes in its motion.
  • Momentum: The product of mass and velocity.
  • Balanced Force: Forces acting on an object that cancel each other out, causing no change in motion.
  • Unbalanced Force: Forces that do not cancel out, causing a change in motion.
  • Newton’s First Law: An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force.
  • Newton’s Second Law: The force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma).
  • Newton’s Third Law: For every action, there is an equal and opposite reaction.

Detailed Notes

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Important Facts

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Comparison Table

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Quick Revision

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Real Life Connection

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Frequently Asked Questions (FAQs)

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Learning Objectives

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