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This post presents Gravitation class 11 notes in a nutshell. This one summarizes the key concepts, formulas, and applications. It also lists down a set of selected questions from the Gravitation chapter (prepared for ISC, CBSE class 11 physics, grade 12 physics, and UPSC preparation, IAS exams).

Isaac Newton unified “earthly” bodies and “heavenly” bodies with the Universal Law of Gravitation. Newton used the universal law of gravity to prove that the moon is accelerating towards Earth just as a body on Earth is falling towards Earth. …


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This post is to guide the students who have opted for Physics as a subject for their class 11. We will have a broad view of the topics and chapters to be studied and also refer to the books and online study materials as a quick reckoner for the 11th Physics study, covering the NCERT syllabus. Hopefully, students will find it useful to start the ball rolling and as well as, plan the study well ahead with confidence.

This post is originally written and available on my blog. The link is here

11th Physics — how to study [Physics study guide class 11 & study notes & materials]

Part 1 of class 11…


This post is to guide the students who have opted for Physics as a subject for their class 11. We will have a broad view of the topics and chapters to be studied and also refer to the books and online study materials as a quick reckoner for the 11th Physics study, covering the NCERT syllabus. Hopefully, students will find it useful to start the ball rolling and as well as, plan the study well ahead with confidence. [ Read the complete post: here ]

11th Physics — how to study [Physics study guide class 11 & study notes & materials]

11th Physics — how to study [Physics study guide class 11 & study notes & materials]

Part 1 of class 11 Physics by NCERT consists of the following chapters:
(1) Physical world…


Here you will get 2 sets of IGCSE physics force and motion worksheet with numerical problems with solution. You will get ample scope to test your understanding of motion equations and force concepts.

The solutions of worksheet set 1 are given on this page itself. And the solution of set 2 numerical worksheet is linked with the individual problem of set 2.

IGCSE physics force and motion worksheet | IGCSE physics numerical-set 1

1) Force of 1000 Newton is applied on a 25 kg mass for 5 seconds. What would be its velocity?

2) A force is applied to a mass of 16 kg for 3 seconds. As the force is…


Gustav Kirchhoff, an eminent German physicist is the person behind Kirchhoff’s first law dealing with electric current. This law is also known as Kirchhoff’s Current Law or KCL. The KCL states that, for any point or node in an electrical circuit, the sum of currents into that point is equal to the sum of currents out of that point.

State Kirchhoff’s first law or KCL | Explain Kirchhoff’s first law with a diagram

Kirchhoff’s first law or current law (KCL) states that, for any point in an electrical circuit, the sum of currents into that point is equal to the sum of currents out of that point.

The diagram above will help to understand…


Derivation of the Equations of Motion: To calculate quantities involving motion in a straight line at a constant acceleration we need four equations. These equations are often informally referred to as the ‘suvat equations’ after the symbols used for the 5 quantities involved.

We will derive equations for the following 5 motion quantities: displacement (s), initial velocity (u), final velocity (v), acceleration (a), and time (t). Before going for the derivation, we will draw a velocity-time graph in the next section.

Velocity time graph required to derive the motion equations

This velocity-time graph depicts a motion of a body in a straight line at a constant acceleration a. It…


The Refractive index of a medium is an important topic of optics or the Light chapter of physics. Solving the numerical problems from this chapter is also a must if we want a good grasp on chapters like the Refraction of light.

We use a number of formulas to solve these problems related to RI or ARI (Absolute Refractive Index).

Here I am going to provide you some important links or URLs that will take you to online tutorials on RI and Numericals on RI.

I believe these articles or posts are going to benefit you if you are serious…


For high school students with science, the chapter on ‘Gravitation and gravitational force’ is quite interesting because it talks of that force that is working between any 2 objects in existence. As we find ourselves standing on the land of this planet it’s because of this force.

Here are a few links where you will find interesting coverage in this chapter.

Numerical problems on gravitational force

The relation between g and G

Why a stone falls towards the earth and not the vice versa

Universal Law of Gravitation by Newton


Here we will work on the derivation of the Terminal Velocity equation or formula using Stokes’ Law.

Derivation of Terminal Velocity Equation

When an object is falling through a fluid, in that case, if we want to analyze its motion (and find out its acceleration, if any) then we need to consider the weight of the object, the upthrust on the object applied by the displaced volume of the fluid, and the viscous drag force caused by the movement of the object in the fluid.

Usually, we consider the equilibrium situation, in which the weight of the object exactly balances…


Fear of uncertainty and nervousness about the future are two dangerous enemies our mind face every now and then. Fear about exams chase us from our childhood.

When we grow up enough to take up a job then comes fear and uncertainty to land up with a decent job, and even if we get one job we can’t become relaxed as every moment there will be tracking of our performance and we have to run a rat race to sustain our jobs.

Workplace politics, relationship problems, career, health, children, and even our parents — they all can make us restless…

Anupam

NIT Grad & IT prof. Writes and teaches HS physics. A motivational speaker and an active blogger with multiple niches. With lots of stories to tell.

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