(a) A jet of water having a velocity of $40 \mathrm{~m} / \mathrm{s}$ strikes a curved vane, which is moving with a velocity of $20 \mathrm{~m} / \mathrm{s}$. The jet makes an angle of 30 degree with the direction of motion of vane at inlet and leaves at an angle of 90 degree to the direction of motion of vane at outlet. Draw the velocity triangles at inlet and outlet and determine the vane angles at inlet and outlet?
Explanation
The velocity triangles are used to determine the vane angles at inlet and outlet. The velocity triangle at inlet is drawn by resolving the velocities of the jet and the vane into their components, and the vane angle is determined from the resulting triangle. Similarly, the velocity triangle at outlet is drawn by resolving the velocities of the jet and the vane into their components, and the vane angle is determined from the resulting triangle.
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