Mechanical Properties of question bank (Physics)

The two wires $A$ and $B$ of equal cross-section but of different materials are joined together. The ratio of Young's modulus of wire $A$ and wire $B$ is $20/11$. When the joined wire is kept under certain tension the elongations in the wires $A$ and $B$ are equal. If the length of wire $A$ is $2.2$ m, then the length of wire $B$ is _______ m.

A cube has side length $5$ cm and modulus of rigidity $10^5$ N/m$^2$. The displacement produced by a force of $10$ N in the upper face of cube is _____ mm.