Simple machines make tasks simpler by reducing the amount of effort it takes for humans to perform certain tasks. Levers, pulleys, and inclines all have one thing in common: they reduce the amount of energy it takes for human to move or lift objects.
Simple machines that are widely used include the wheel and axle, pulley, inclined plane, screw, wedge and lever.
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Answer:
Simple machines make tasks simpler by reducing the amount of effort it takes for humans to perform certain tasks. Levers, pulleys, and inclines all have one thing in common: they reduce the amount of energy it takes for human to move or lift objects.
Simple machines that are widely used include the wheel and axle, pulley, inclined plane, screw, wedge and lever.