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Class notes

Class 9 Physics – Force and Laws of Motion (Easy Notes + Formulas + Examples)

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2025/2026 Written for academic year
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Well-structured notes covering the chapter Force and Laws of Motion. These notes explain Newton's Laws, momentum, balanced and unbalanced forces, and important formulas in a student-friendly format. Includes: Force and its Effects Contact and Non-contact Forces Newton's First, Second and Third Laws Momentum Conservation of Momentum Important Examples and Formulae Suitable for quick revision and examinations.

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Force and Laws of Motion

1. Force
Force is a push or a pull that can change:

 the shape of an object
 the speed of an object
 the direction of motion
 the state of rest or motion of an object

Example:
Opening a door by pushing it is an example of applying force.




2. Effects of Force
A force can:

 move a stationary object
 stop a moving object
 change the speed of an object
 change the direction of motion
 change the shape of an object




3. Types of Forces
(a) Contact Forces

These forces act only when there is physical contact between two objects.

Examples:

 Muscular force
 Frictional force

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June 14, 2026
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Class notes
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Ayyan ahmad
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  • force and laws of motion
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  • class 9th
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