Machine Journals
The operation of a machine may involve the transformation of chemical, thermal, electrical, or nuclear energy into mechanical energy, or vice versa, or its function may simply be to modify and transmit forces and motions. All machines have an input, an output, and a transforming or modifying and transmitting device.
Machines that receive their input energy from a natural supply, like air currents, moving water, coal, petroleum, or uranium, and rework it into energy square measure called prime movers. In these machines the inputs vary; the outputs square measure typically rotating shafts capable of being employed as inputs to alternative machines, like electrical generators, hydraulic pumps, or air compressors. All 3 of the latter devices could also be classified as generators; their outputs of electrical, hydraulic, and gas energy is used as inputs to electrical, hydraulic, or air motors. These motors is accustomed drive machines with a spread of outputs, like materials process, packaging, or conveyance machinery, or such appliances as stitching machines and laundry machines.
The hand axe, made by chipping flint to form a wedge, in the hands of a human transforms force and movement of the tool into a transverse splitting forces and movement of the workpiece. The hand axe is the first example of a wedge, the oldest of the six classic simple machines, from which most machines are based. The second oldest simple machine was the inclined plane which has been used since prehistoric times to move heavy objects
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