Sagot :
1.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
1.simple machines are useful because they reduce effort or extend the ability of people to perform tasks beyond their normal capabilities.
2. yes, becouse the machine acted in our body is joints and puvotd are needed to function well.
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