# A 7.5 cm diameter jet of water strikes a curved plate at its centre with a velocity of 20 m/s

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## A 7.5 cm diameter jet of water strikes a curved plate at its centre with a velocity of 20 m/s. The curved plate is moving with a velocity of 8 m/s in the direction of the jet. The jet is deflected through an angle of 65°. By assuming the plate as smooth, what is the angle made by the relative velocity at the outlet of the plate?

ANSWER= [C] 15°

### Detailed Solution for Civil Engineering Exam

Since the jet is deflected by 165°, the relative velocity at the outlet will make an angle of 15° with the direction of plate movement. This is based on the assumption that for shockless exit, relative velocity should be tangential to the plate at the outlet.

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