Speaking of simple machines this is what I've found. (I'm sorry i cant take a picture of it and i do not know how to place it). I have found this simple machine which uses the principle of the wheel and axle.A wheel and axle is a simple machine made up of two circular objects of different sizes. The wheel is the larger object. It turns about a smaller object called an axle. Because the wheel is larger than the axle, it always moves through a greater distance than the axle. A force applied to the wheel is multiplied when it is transferred to the axle, which travels a shorter distance than the wheel . A wheel is a lever that can turn 360 degrees and can have an effort or resistance applied anywhere on that surface. The effort or resistance force can be applied either to the outer wheel or the inner wheel (axle). whoops i almost forgot to mention about the simple machine I found in my house . It s a door knob .A door knob uses a larger "knob" to turn a smaller rod. You trade distance for force. In a bicycle you trade force for distance. By turning the bicycle axle with a pedal you get more distance (or speed) as the larger wheel turns.
Nirmal Kumar
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