motion, forces, and energy

Introduction - In the physical world, one of the most common phenomena is motion. The branch of Physics, which deals with the behaviour of moving objects, is known as mechanics. Mechanics is further divided into two sections namely Kinematics and Dynamics. Kinematics deals with the study ..

Consider a simple system in which two blocks are connected by a string which passes over a light, frictionless pulley as shown below. M 1 a = T-m 1 g M 2 a = m 2 g-T a (m 1 + m 2 ) = (m 2 - m 1 )..

Consider a body of mass 'm' which is initially at rest. When a force 'F' is applied on the body, let it start moving with a velocity 'V' and cover a distance 's'. The force produces acceleration 'a' in the body. The force 'F' does work when it moves the body through a ..

When a force acts on an object and the object moves in the direction of force, we say that the force has done work on the objec..

Simple Pendulum and Restoring Force - In the previous chapters we studied the motion of a body moving with uniform speed in a straight line and also learnt to calculate the distance traveled by a body in any given time. We then observed that the bodies do not always move with un..

To cause a displacement of a body controlled by elastic forces, work has to be done. For example, work has to be done in stretching a spring against the elastic forces. This work will be stored in the body as potential energy. When the deforming force i..

The lattice energies of alkali metal salts are very high because strong electrostatic forces of attraction hold up the cations and anions formed. Lattice energy gives a measure of the forces of attraction between the ions. It is defined as the amount of ..

Kinetic Energy - It is a matter of common experience that a fast moving stone can break a windowpane, falling water can rotate turbines and moving air can rotate windmills and propel sailboats. In all these examples, the moving body possesses energy. Work is done by the body in ..

It is a matter of common experience that a fast moving stone can break a windowpane, falling water can rotate turbines and moving air can rotate windmills and propel sailboats. In all these examples, the moving body possesses energy. Work is done by the body in motion. This type..

Electric charges and current attract or repel each other, i.e., they exert forces on each other. Thus, work needs to be done in order to move them with respect to one other. The energy associated with this work is called electrical or electromagnetic energy..