Question

A steel ring of radius r and cross sectional area 'A' is fitted on to a wooden disc of radius R (R > r). If the Young's modulus be Y, then what is the force with which steel ring is expanded?

• A. $\frac{AYR}{r}$
• B. $\frac{AR}{Y_r}$
• C. $\frac{A}{Y}(\frac{r}{R-r})$
• D. $AY(\frac{R-r}{R})$

Answer 1

Answer: (D)

$AY(\frac{R-r}{R})$

Answer 2

The correct option is (D): $AY(\frac{R-r}{R})$