Question

2cm of rain falls in 10 minutes. Assuming that the fall is steady and uniform and the velocity of the rain drops on striking the ground is 20m/s. Calculate the pressure on the ground due to the shower.(Assume the velocity of water be zero after impact.)

Answer 1

assuming unit area, rate of fall=( 2/600) cm/s=
$(1 \div 3) {10}^{ - 4}m {s}^{ - 1}$


so force is= rate of fall× velocity=1/3×(10^-4)×20=0.67×(10^-3)
this will be pressure as area is unity.