Physics

The energy we use comes from the Sun, wind and water power etc. Actually, all of the energy we get comes straight or indirectly from the Sun.

Energy exists in various forms. Some of the main forms of energy are in this tutorial.

Energy is an essential and basic concept in science. It links almost all the natural phenomena. When we say that a body has energy, we mean that it has the capability to do work.

Let us study the factors on which torque or moment of a force depends. You may have seen that a mechanic uses a spanner to loosen or tighten a nut or a bolt.

The momentum of an isolated system of two or more than two interacting bodies remains constant.

Momentum of a body is the quantity of motion it has due to its mass and velocity.

On the basis of his observations, Newton concluded that the force which triggers an apple to fall on the Earth and the force which keeps the moon in its orbit is of the very same nature.

A wave is a disruption in the medium which causes the particles of the medium to undergo vibratory motion about their mean position in equal intervals of time.

Sir Isaac Newton’s three laws of motion describe the movement of huge bodies and how they interact. While Newton’s laws might seem obvious to us today, more than 3 centuries ago they were thought revolutionary.

Friction is a tangential resistant force between two surfaces that oppose the motion of moving objects. Friction is a force that enters the action as soon as a body is pushed or pulled over a surface.