Laws Of Motion Class 11 Notes


“The property of an object by virtue of which it cannot change its state of uniform motion along a straight line or rest on its own is called as inertia.”

It is the measure of the mass of a body. There are 3 types of inertia.

  • Inertia of rest
  • Inertia of motion
  • Inertia of direction


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

Force can be categorized into 2 types.

  • Constant Force
  • Action at a distance force

Newton’s Laws of Motion

First Law:

“A body continues in its state of rest or of uniform motion in a straight line unless it is compelled by some external force to change that state.”

Second Law:

“The rate of change of momentum of a body is directly proportional to the impressed force and takes place in the direction of the force.”

Third Law:

“To every action, there is an equal and opposite reaction.”

The Laws of Motion Class 11 Notes are given here. Laws of motion is a very important chapter in CBSE Class 11. Students can check the links to get all Laws of Motion Class 11 Notes to prepare efficiently for their examination.

Students can follow these Laws of Motion Class 11 Notes to clear their concepts and prepare for their exam in a better way.

Practise This Question

A few molecules /parts  are grouped into categories. Identify the incorrect grouping