Class 9th Science Force And Laws Of Motion NCERT Notes CBSE 2023
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Force and Laws of Motion Class 9 Notes

Force and Laws of Motion Class 9 Notes

Chapter 9 Force and Laws of Motion

NCERT Class 9 chapters deal with forces and laws of motion. In this chapter, students learn about balanced and unbalanced forces, laws of motion, inertia and mass, and more. Chapter 9 of the Vidyakul NCERT notes for Class 9 Science is an essential reference for students. NCERT notes for Class 9 Science are written in easy-to-understand language and cover all the essentials.

Vidyakul provides students with the NCERT notes free of charge. In addition to these notes, Vidyakul offers over 300 free exercises on its platform. We encourage students to complete the entire curriculum on time before proceeding to problem practice. These notes helps students better understand the subject matter and solve the questions asked in the exam. So, students can simply register and start their education accordingly. 

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Points to Remember

The important points to remember from Class 9 Science Chapter 9 are as follows:

  • An effort that modifies an object’s status when it is at rest or in motion is called a force. It has the power to alter an object’s motion and direction. A force can alter an object’s shape as well.

  • Static things are propelled by force.

  • Inertia prevents items from moving.

  • A body’s shape can be altered by force, which can also modify a body’s motion.

  • There will not be any net effective force acting on an object when balanced forces are applied to it. A change in motion is not brought about by balanced forces.

  • An object’s speed and/or direction of motion can be altered by unbalanced forces acting on it. It moves in the direction of the strongest force acting on it.

Topics and Sub-topics

NCERT notes for 9th Grade Science Chapter 9 helps students understand the laws of motion in detail. Vidyakul makes it easy for students to access learning materials online. Additionally, all of these study materials are provided free of charge so students can prepare for the exam. If you refer to Vidyakul when practicing, you can get good grades.

Laws of Force and Motion is an update of Class 8 Force and Pressure. Students need to constantly review Vidyakul concepts in order to do well on the exam. Vidyakul also provides 3D and explanatory videos on these topics to introduce students to these concepts. Now let's look at the important topics of this chapter.

Sr No

Topic Name


Balanced and Unbalanced Forces


First Law of Motion


Inertia and Mass


Second Law of Motion


Third Law of Motion


Conservation of Momentum

Few Important Questions

  • What is ‘Force’?

A force is a push or pull upon an object resulting from the object’s interaction with another object.

  • How many laws of motion are there?

There are totally 3 laws of motion.

  • What is an ‘Unbalanced force’?

When the forces applied to an object in opposite directions that are not equal in size, then they are known to be unbalanced forces.

Learn more about the same in Force and Laws of Motion Class 9 Notes pdf.

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Force and Laws of Motion Class 9 Science Notes Part - 1

Force and Laws of Motion Class 9 Science Notes Part - 2

Force and Laws of Motion Class 9 Science Notes Part - 3

Force and Laws of Motion Class 9 Science Notes Part - 4