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Simply put, a simple machine makes the work much easier. Simple machines reduce the amount of force needed to do the work. A pulley, for instance, is a great example of a simple machine.
Lever Hoist
A complex machine.
A train is not a simple machine.
A fulcrum is a part of a simple machine, the lever. Without the fulcrum what is left of the simple machine can no longer increase the applied force and is no longer a simple machine.
how many simple machine are needed to make a compound machine
A block and tackle.
Simple
I suppose the narrow bow of a boat is a wedge
6 simple machines.
use when only needed
Simple
Simple
Simply put, a simple machine makes the work much easier. Simple machines reduce the amount of force needed to do the work. A pulley, for instance, is a great example of a simple machine.
A bike is a simple machine, because it has a wheel and axle.
The Mechanical Advantage is the ratio of the force needed to lift an object using the simple machine divided by the weight of the object
An airplane is not a simple machine. A lever is a simple machine. A wheel is a simple machine. Any machine that can be described by a mathematical formula is a simple machine.