Momentum

Momentum

1. Definition: Total force exerted ON a fluid.

2. Industry Application: Momentum equation can be used to determine how fast a fluid is flowing, or the velocity of a fluid in a reservoir.

3. Figure 2: Equation: Force = Mass Flow * ( Velocity out pt1 - velocity in)

   • Force also equals, (density of fluid)*(flow rate of fluid)*(Velocity out - Velocity in)
   • Units of momentum = N*s OR lbf*s

4. Conservation of Momentum; momentum in MUST equal momentum out

   • Figure 1: The balls will have the same mass and thus have the same velocity until an outside force acts on them.

5. Figure 3: Another picture of the momentum equation in a system with more than one object.

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