1.

A pressure-pump has a horizontal tube of cross-sectional area 10 cm2 for the outflow of water at a speed of 20 m/s. The force exerted on the vertical wall just in front of the tube which stops water horizontally flowing out of the tube, is: [given : density of water = 1000 kg/m3] (A) 300 N (B) 500 N (C) 250 N (D) 400 N

Answer»

Correct option is (D) 400 N

F = Pa\(\nu\)= 103 x 10 x 10-4 x 20 x 20

F = 400



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