# Mechanical Properties of Solids

## Class 11 NCERT Physics

### NCERT

1   A steel wire of length $4.7 m$ and cross-sectional area $3.0 * 10^{-5} m ^2$ stretches by the same amount as a copper wire of length $3.5 m$ and cross-sectional area of $4.0 * 10^{-5} m^ 2$ under a given load. What is the ratio of the Young’s modulus of steel to that of copper?