machine

MACHINE

Machines became part of our daily lives. Machines help us to reduce efforts required to do the work. All machines are based on the combination of ‘simple machines’. A simple machine is a mechanical device that changes the direction or magnitude of a force. Scissors, brakes, pulley, gears, inclined plane, screw etc. are the examples of simple machines.

an apparatus using mechanical power and having several parts, each with a definite function and together performing a particular task.

Following are the formula for defining relation between power , force, distance and time.

Power  = work / Time 

           = (force X distance) / Time 

           = force X speed

Power  = force X speed
Work   = force X distance.