1.

A long crow-bar is used to over through the big stone.Why ?

Answer»

It means a force 5 kg will be able to lift the 50 kg stone with a rod of 6 feet length (BC+ BA). This is how a crow bar is USED. It is an oversimplified example of using a lever that GIVES substantial mechanical advantage. Hope this CLARIFIES the point.Explanation:please MARK as brainliest answerand follow me plz



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