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                                                         Complex machine 

complex machine is a machine that's  makes our life easer to work .with complex machine we can do hard thing easily . heavy things we can carry easily .   we can do so many heard    thing easily with two simple machine can make one complex machine.

 

how machine works ?

Machines simply transmit mechanical work from one part of a device to another part. A machine produces force and controls the direction and the motion of force, but it cannot create energy.                  

what is the work of a machine?

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.

how machine helps us?

When a force is applied over a distance, it produces work. ... It also takes twice as much work to lift the same object twice as far. As indicated by the math, the main benefit of machines is that they allow us to do the same amount of work by applying a smaller amount of force over a greater distance.