Question

An air filled balloon is at a depth of 1 km below the water level in an ocean. Determine the normal stress on the balloon (atmospheric pressure=${10}^{5}Pa$)

• A. $98\times {10}^{5}N/m^2$
• B. $99\times {10}^{5}N/m^2$
• C. $98\times {10}^{3}N/m^2$
• D. $99\times {10}^{3}N/m^2$

Answer 1

The correct option is B $99\times {10}^{5}N/m^2$

$\text{Stress}=P$

$\text{So pressure at depth=}{P}_0+\rho gh$

$={10}^5+{10}^3\times 9.8\times {10}^3$

$=99\times {10}^5$

$\text{Answer:-}\text{(B)}$