A stream of water strikes a stationary turbine bladehorizontally, as the drawing

Question

A stream of water strikes a stationary turbine bladehorizontally, as the drawing illustrates. The incident water streamhas a velocity of +18.0 m/s, while the exiting water stream has avelocity of -18.0 m/s. The mass of water per second that strikesthe blade is 54.0 kg/s. Find the magnitudeof the average force exerted on the water by the blade ________N A stream of water strikes a stationary turbine bladehorizontally, as the drawing illustrates. The incident water streamhas a velocity of +18.0 m/s, while the exiting water stream has avelocity of -18.0 m/s. The mass of water per second that strikesthe blade is 54.0 kg/s. Find the magnitudeof the average force exerted on the water by the blade ________N

Explanation / Answer

Mass of water per second M/ t = 54 kg / s

Change in velocity   dv =18 m / s – ( -18 m / s)

                                      = 36 m / s

Magnitude of the average force exerted on the water by theblade

   F = ( M/t) dv

       = 1944 N

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