# physics

A stream of water strikes a stationary turbine blade horizontally, as the drawing illustrates. The incident water stream has a velocity of + 17.4 m/s, while the exiting water stream has a velocity of – 15.0 m/s. The mass of water per second that strikes the blade is 33.6 kg/s. Find the magnitude of the average force exerted on the water by the blade.

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3. 👁 2,083
1. force = rate of change of momentum

change of velocity = 15+17.4 = 32.4 m/s

rate of change of momentum = mass per second * change of velocity

= 33.6 kg/s * 32.4 m/s

= 1089 kg m/s^2 or Newtons

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2. 21

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2. 👎 2

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