Question

A rectangular tank is 10 M long 10 M broad and 3 M high it is filled to the rim with water calculate the thrust at the bottom .

Answer 1

We know that the thrust is the reaction force.

$force=weightofthewater$

$weightofthewater=massofwater\times gravity$

$M_W=V\times density$
V=10×10×3=300 m3V=10 \times 10 \times3=300~ m^3V=10×10×3=300 m3

density of water=1000kg/m3density ~of~ water=1000kg/m^3density of water=1000kg/m3

$massofwater=300\times 1000=300000kg$

force=thrust =weight of the water=300000×9.8=2940000N =$2.94\times {10}^{6}N$