Question

A wire of radius r young modulus y and length l is hung from a fixed point

Answer 1

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MECHANICAL PROPERTIES OF MATTER

Question

A wire of radius r, Youngs modulus Y and length l is hung from a fixed point and supports a heavy metal cylinder of volume V at its lower end. The change in length of wire when cylinder is  immersed in a liquid of density is in fact

decreases by

increases by

decreases by

increases by

Solution

So,  change  in  length  is

length decreases because bouyant force acts in upward direction,  So, tension decreases, so length also decreases.