From Newton’s second law of motion, we can define a force F to be the change in momentum of an object with a change in time. Momentum is the object’s mass m tim… See more

If we are dealing with a solid, keeping track of the mass is relatively easy; the molecules of a solid are closely bound to each other and a solid retains its shape. But if we ar… See more

This is the dimension of a force. There is an additional effect which we must account for if the exit pressure p is different from the free stream pressure. The fluid pressure is related to t… See more

F = (m dot * V)e – (m dot * V)0 + (pe – p0) * Ae
Normally, the magnitude of the pressure-area term is small relative to the m dot-V terms. Let … See more