
Vertical circular motion minimum speed proof - Physics Forums
Nov 21, 2009 · so the body reached the top.. let's take what happened so far, in reverse.. now the body has velocity of (rg)^0.5 to the other side, mg is still downward.. we KNOW the body will …
for measuring velocity of water so we have to calculate velocity using head calculation or from stagnation pressure which we measure using a pitot tube. Calculate Velocity from Head We …
Speed at perihelion and aphelion? - Physics Forums
Jan 16, 2009 · This equation follows directly from conservation of energy. The total energy (kinetic plus potential) of a point mass m separated by a distance r from some other point mass M and …
Understanding Zero Velocity and Non-Zero Acceleration: Explained
Aug 1, 2009 · The problem here is that you have a fundamental misunderstanding of what acceleration means in relation to velocity. Consider a curve of velocity vs. time. At some time, …
Demystifying the Often Misunderstood Bernoulli's Equation
Dec 3, 2018 · As a sanity check, we can perform a thought experiment based on a force balance (momentum conservation). If the velocity increases from point 1 to point 2, then that …
How Is the Formula v=wr Derived in Vector Terms? - Physics Forums
Oct 15, 2014 · The angular velocity ω is usually a scalar, rather than a vector quantity. The magnitude of the radial velocity is given as v = ω r, where r is the magnitude of the radius …
Flow Rate in Pipe: Q, v, A Explained - Physics Forums
Jan 20, 2015 · Hi, I have a question regarding the flow rate in a pipe. According to the general rule the flow rate is: Q = v * A where Q [m3/s] v [m/s] A [m2] So according to this formula the flow …
Effect of increase pipe diameter on fluid - Physics Forums
Aug 5, 2012 · This depends on what you mean by flow rate. You have to be more specific than that. The mass flow rate will remain the same. For an incompressible fluid like water, that …
What is the significance of sqrt{2gh} - Physics Forums
Apr 22, 2010 · I've seen it in escape velocity problems, though with an R instead of h. I've seen it with conservation of momentum applications, and it's similar to PE = mgh. Yesterday my …
Speed of falling object underwater - Physics Forums
Jul 25, 2019 · Calculate all of the forces, then iterate with small time steps. The drag force needs to be recalculated after each time step. The time steps need to be small enough that the …