Hydraulics and Fluid Mechanics in ME
The force exerted by a jet of water (in a direction normal to flow) impinging on a fixed plate inclined at an angle θ with the jet is

(waV²/2g) × sin 2θ
(waV/2g) × sin θ
(waV²/g) × sin θ
(waV/g) × sin θ

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

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

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