principles of friction

By separating the surfaces by an air cushion e.g., a hovercraft, can travel over rough land, swamp or sea. Here, as the moving object does not come in contact with the other solid surface, the frictional forces are reduced to a very great extent. Hovercraft Principle..

Appliances used in our day to day life are based on the principles of electricity and magnetism. Electricity is one of the most important sources of energy. Lights, fans, motors, radios and television are some common appliances which work on electricity. Benjamin Franklin Historically, it..

Appliances used in our day to day life are based on the principles of electricity and magnetism. Electricity is one of the most important sources of energy. Lights, fans, motors, radios and television are some common appliances which work on electricity. Historically, it was fri..

Newton's First Law of Motion - Every body continues in its state of rest or of uniform motion in a straight line unless compelled by some external force to act otherwise. It is a matter of common experience that objects at rest do not begin to move of their own accord. If we place an object in a ce..

Wheel and Axle - Figure above shows a wheel and axle. At one end of the axle, a wheel of a greater diameter is fixed. The axle and the wheel both rotate about the same axis. Ropes have been wound around both the wheel and the axle. The load can be lifted by pulling on the rope around the wheel once..