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A fire hydrant delivers water of density...

A fire hydrant delivers water of density `rho` at a volume are `L`. The water travels vertically upward through the hydrant and then does `90^(@)` turn to emerge horizontally at speed `V`. The pipe and nozzel have uniform corss-section throught out. The force exerted by the water on the corner of the hydrant is

A

`rho V L`

B

zero

C

`2 rho VL`

D

`sqrt(2)rho VL`

Text Solution

Verified by Experts

The correct Answer is:
D
Force exerted in vertical direction and horizontal direction are
`F_(1) =F_(2) = v_(rel) xx (dm)/(dt) = V rho *L`
`implies F_(n et) rho VLsqrt(2)`
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