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Grade: 9
        
a hose ejects water at a speed of 20 cm per second through a hole of area 100 cm square if the water strikes a wall normally calculate the force on the wall assuming the velocity of the water normal to the wall is zero after collision
2 years ago

Answers : (1)

Khimraj
3007 Points
							
mass of water ejects per second = Area*velocity = 1000cm3/s = 10-3m3/s
so force = change in momentum = m*v = 10-3*10-1 = 10-4N
Hope it clears.
2 years ago
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