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- Vertical circular motion minimum speed proof - Physics Forums
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 complete the half circle reversed motion, because we've just seen it complete it
- Calculating Nozzle Flow Rate - Physics Forums
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 can use Bernoulli's Equation to calculate velocity of a fluid from head Head is the distance from outlet to top of water V= 2gh V = Velocity m sec or feet per sec
- Finding Velocity given x and y velocities - Physics Forums
1 How do you find the velocity of an object if you are given the x and y components of the velocity? 2 Not sure! 3 It makes the most sense to use the Pythagorean Theorem to find the magnitude then trig to find the angle, but I've got a classmate telling me you simply add together the x and y components Which is it?
- Solving for distance using only initial velocity and coefficient of . . .
At the early point (probably around chapter 4) of an "elementary physics" textbook, a student encounters problems where, given an initial velocity and coefficient of friction, the student is expected to provide the resulting final displacement This is a stage of the textbook where kinetic energy equations and "work" equations have not yet been
- What is the four-momentum of a photon and its associated four-velocity?
That definition of the four-momentum is nice, because it is a nice direct analogy of the usual Newtonian momentum However, as you note, the four-velocity of a photon is not defined, so that particular definition of the four-momentum is not useful for a photon However, even for a photon the following definition of energy applies:
- Converting velocity to pressure - Physics Forums
Radiologists often use Doppler ultrasound to measure flow velocity change in a blood vessel with a stenosis- but I would like to make a conversion to a pressure differential Equation: P2-P1 = (V2^2 - V1^2) 2 (assuming frictionless system, blood density ~ 1 0 gm cm^3, and no change in height)
- How Do You Calculate Closing Velocities and Determine Their Range?
If I'm not mistaken, the closing velocity is the velocity that the planes get closer to each other And the closing speed is its magnitude, that is, the rate of change of the distance between the airplanes If the planes are at positions $\mathbf p_1$ and $\mathbf p_2$ and have velocities $\mathbf v_1$ and $\mathbf v_2$, then the closing
- Exit velocity of a gas through a hole - Physics Forums
The exit velocity is determined by the pressure difference between the tank and the environment and also the frictional forces both internal to the fluid and between the fluid and the orifice sides Ignoring frictional forces and assuming a constant pressure, the exit velocity of a fluid is always the same no matter how big the orifice diameter is
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