Question 169: Properties of Matter

Question

A liquid of density $$\rho $$ is coming out of a hose pipe of radius a with horizontal speed $$\upsilon $$ and hits a mesh. 50% of
the liquid passes through the mesh unaffected. 25% looses all of its momentum and 25% comes back with the same speed. The resultant pressure on the mesh will be :

Accepted Answer

Momentum per second carried by liquid per second is $$ho $$av
2
net force due to reflected liquid = 2$$ 	imes $$$$\left[ {{1 \over 4}ho a{v^2}} ight]$$
net force due to stopped liquid = $${{1 \over 4}ho a{v^2}}$$
Total force = $${{3 \over 4}ho a{v^2}}$$
net pressure = $${{3 \over 4}ho {v^2}}$$

Answer

$${3 \over 4}\rho {v^2}$$

Answer

$${1 \over 4}\rho {v^2}$$

Answer

$${1 \over 2}\rho {v^2}$$

Answer

$$\rho {v^2}$$

Properties of Matter

A liquid of density $\rho is coming out of a hose pipe of radius a with horizontal speed \upsilon $ and hits a mesh. 50% of the liquid passes through the mesh unaffected. 25% looses all of its momentum and 25% comes back with the same speed. The resultant pressure on the mesh will be :

Choose the correct answer: