Hydraulics and Fluid Mechanics in ME
The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is

[wa (V - v)²]/2g
[wa (V - v)]/2g
[wa (V - v²)]/g
[wa (V - v)]/g

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Hydraulics and Fluid Mechanics in ME
The discharge through a channel of trapezoidal section is maximum when

Width of channel at the top is equal to twice the width at the bottom
The sloping side is equal to half the width at the top
The sloping side is equal to the width at the bottom
Depth of channel is equal to the width at the bottom

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