JEE-IIT-NCERT Physics & Math

Earth satellites are objects which revolve around the earth. Their motion is very similar to the mo… Read more Earth Satellites

If a stone is thrown by hand, we see it falls back to the earth. Of course using machines we can sh… Read more Escape Speed

We had discussed earlier the notion of potential energy as being the energy stored in the body at i… Read more Gravitational Potential Energy

Consider a point mass m at a height h above the surface of the earth as shown in Fig.1. The radius … Read more Acceleration Due To Gravity Below And Above The Surface Of Earth

The earth can be imagined to be a sphere made of a large number of concentric spherical shells with… Read more Acceleration Due To Gravity Of The Earth

The value of the gravitational constant G entering the Universal law of gravitation can be determin… Read more The Gravitational Constant

Legend has it that observing an apple falling from a tree, Newton was inspired to arrive at an univ… Read more Universal Law Of Gravitation

The three laws of Kepler can be stated as follows:  1. Law of orbits : All planets move in elliptic… Read more Kepler’s Laws

One of the most common motions observed in daily life is the rolling motion. All wheels used in tra… Read more Rolling Motion

We are now in a position to revisit the principle of conservation of angular momentum in the contex… Read more Conservation of angular momentum

We have studied in section 7.7, the angular momentum of a system of particles. We already know from… Read more Angular Momentum In Case Of Rotation About A Fixed Axis