1. A small diameter jet of water with a velocity of 15.8 m/s strikes a large, fixed flat plate which is normal to the axis of the jet. The force of the water on the plate is 280 N. What force is exerted on the plate if the jet velocity is doubled while the diameter is held constant?

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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1. A small diameter jet of water with a velocity of 15.8 m/s strikes a large, fixed flat plate
which is normal to the axis of the jet. The force of the water on the plate is 280 N.
What force is exerted on the plate if the jet velocity is doubled while the diameter is
held constant?
2. A jet issued at the rate of 155 L/s and a velocity of 35 m/s strikes a blade moving in
the same direction at 20 m/s. The deflection angle of the blade is 150°. Neglecting
friction in the blade, determine the X and Y components of the force exerted by the jet
on the blade.
3. A 300-mm-diameter pipe is connected to a 600-mm-diameter water main by a reducer.
The velocity at the 300 mm pipe being 5 m/s and the pressure is 420 kPa. Neglecting
losses, find the resultant force exerted by water on the reducer.
4. Determine the adequacy of a 600-mm-diameter pipe of length 2.5 km with a thickness
of 20 mm if it is capable of carrying a maximum stress of 124 MPa. The pipe is to
carry a flow of 0.85 m3/s under a static head of 200 m of water, and an additional
water hammer pressure caused by a quick-closing-valve located at its end. Use EB=
2.07 x 10° Pa for water and E = 200,000 MPa for steel.
Transcribed Image Text:1. A small diameter jet of water with a velocity of 15.8 m/s strikes a large, fixed flat plate which is normal to the axis of the jet. The force of the water on the plate is 280 N. What force is exerted on the plate if the jet velocity is doubled while the diameter is held constant? 2. A jet issued at the rate of 155 L/s and a velocity of 35 m/s strikes a blade moving in the same direction at 20 m/s. The deflection angle of the blade is 150°. Neglecting friction in the blade, determine the X and Y components of the force exerted by the jet on the blade. 3. A 300-mm-diameter pipe is connected to a 600-mm-diameter water main by a reducer. The velocity at the 300 mm pipe being 5 m/s and the pressure is 420 kPa. Neglecting losses, find the resultant force exerted by water on the reducer. 4. Determine the adequacy of a 600-mm-diameter pipe of length 2.5 km with a thickness of 20 mm if it is capable of carrying a maximum stress of 124 MPa. The pipe is to carry a flow of 0.85 m3/s under a static head of 200 m of water, and an additional water hammer pressure caused by a quick-closing-valve located at its end. Use EB= 2.07 x 10° Pa for water and E = 200,000 MPa for steel.
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