a device without moving parts that changes the size or direction of a force

A device that combines two or more simple devices.

Which of the following is a simple machine?

The ratio of output force to input force.

The percentage of the input work that is converted to output work. The higher the better.

The fixed point around which a lever pivots.

Power is ....

The unit of work.

Which of the following is a requirement for work to be done?

Which of the following is a form of an inclined plane?

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