Question

13. What is a lever ?
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Answer 1

a bar or tool that is used to lift or open something when you put pressure or force on one end

Answer 2

A LEVER IS A SIMPLE MACHINE CONSISTING OF A BEAM OR RIGID ROD PIVOTED AT A FIXED HINGE, OR FULCRUM. A LEVER IS A RIGID BODY CAPABLE OF ROTATING ON A POINT ON ITSELF. ON THE BASIS OF THE LOCATIONS OF FULCRUM, LOAD AND EFFORT, THE LEVER IS DIVIDED INTO THREE TYPES...

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