There are two holes one each along the opposite sides of a wide rectangular tank. The cross section of each hole is 0.01 m2 and the vertical distance between the holes is one meter. The tank is filled with water. The net force on the tank in newton when the water flows out of the holes is: (density of water is 1000 kg/m3)

# There are two holes one each along the opposite sides of a wide rectangular tank. The cross section of each hole is 0.01 m2 and the vertical distance between the holes is one meter. The tank is filled with water. The net force on the tank in newton when the water flows out of the holes is: (density of water is 1000 kg/m3)

1. A

100

2. B

200

3. C

300

4. D

400

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### Solution:

Given,

We know that,

${\mathrm{F}}_{\mathrm{net}}=\left(\mathrm{\rho A}\right){{\mathrm{v}}_{2}}^{2}-\left(\mathrm{\rho A}\right){{\mathrm{v}}_{1}}^{2}=\mathrm{\rho A}\left({{\mathrm{v}}_{2}}^{2}-{{\mathrm{v}}_{1}}^{2}\right)$

$\therefore {\mathrm{F}}_{\mathrm{net}}=\mathrm{\rho A}2\mathrm{g}=1000×0.01×2×10=200\mathrm{N}$

Hence the correct answer is 200.

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