Answer:
Machines are important in today's world because they can do things more efficiently. They help with so many different jobs that humans cannot do on their own. There are some who think that machines will take over the world, but it is up to the people to control what they do.
Simple machines are useful because they reduce effort or extend the ability of people to perform tasks beyond their normal capabilities. Simple machines that are widely used include the wheel and axle, pulley, inclined plane, screw, wedge and lever.
Which simple machine is the most important:
Wheel and axle. The wheel is considered to be one of the most significant inventions in the history of the world.
Hope it helps.
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