Question

what is a simple machine​

Answer 1

Answer:

simple machine, any of several devices with few or no moving parts that are used to modify motion and the magnitude of a force in order to perform work. ... The simple machines are the inclined plane, lever, wedge, wheel and axle, pulley, and screw.

Explanation:

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Answer 2

Simple Machine:

• Simple machine, any of several devices with few or no moving parts that are used to modify motion and the magnitude of a force in order to perform work.
• The simple machines are the inclined plane, lever, wedge, wheel and axle, pulley and screw.

The inclined plane:

        An inclined plane consists of a sloping surface: it  is used for raising heavy bodies. The plane offers a mechanical advantages in the force required to move an object up the incline is less than weight being raised.

        eg., ramps and switchback roads.

Lever:

     A lever is a bar or board that rests on a support called a fulcrum. A downward force exerted on the one end of the lever can be transformed and increased in upward direction at the other end.

Wheel and axle:

      A wheel and axle is made up of a circular frame that revolves on a shaft or rod. It earliset form it was probably used for raising weights or water buckets from wells.

Pulley:

   A pulley is a wheel that carries a flexible rope, cord, chain, or belt on its rim. Pulley are used singly or in combination to transmit energy and motion. It is especially for lifting weights.