Question

what is the use of a lever if its mechanical advantage is equal to 1?

Answer 1

Levers can be used to exert a large force over a small distance at one end by exerting only a small force over a greater distance at the other. A lever (/ˈliːvər/ or US: /ˈlɛvər/) is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum.Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. The device preserves the input power and simply trades off forces against movement to obtain a desired amplification in the output force. The model for this is the law of the lever.