A jet of water from a fixed nozzle has a diameter of 25 mm and strikes a flat plate at an angle of 30° to the normal to the plate. The velocity of jet is 5 m/s and surface of plate is frictionless. Calculate the force exerted normal to the plate : (i) If the plate is stationary and (ii) If the plate is moving with a velocity u of 2 m/s in the same direction as the jet. Jet 30 e = 60 %3D V sin 0 30 V

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.