Physics
Fluid-Mechanics
Easy
Question
The tube shown in figure is of uniform cross-section. Liquid flows through it at a constant speed in the direction shown by arrows. Then the liquid exerts on the tube is:
- a net force to the right
- a net force to the left
- a clockwise torque
- an anticlockwise torque
The correct answer is: a clockwise torque
The force exerted by the liquid at the bends is shown. The liquid undergoes change in momentum at these points. The two forces from a couple exerting a clockwise torque
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