Oct 31, 2022 · The viscous force within a fluid will depend on the velocity gradient (aka shear rate) within the fluid. That does not mean that the viscosity is a function of velocity. Viscosity is …

Dec 27, 2024 · I thought velocity was always a vector quantity, one with both magnitude and direction. When it came to the suvat equations, where v = final velocity, and u = initial velocity, …

Nov 21, 2009 · hi, i've read in a lot of places that the minimum speed fora body to "finish" a vertical circle is (rg)^0.5, but I've never understood why.. they assume the...

Jul 11, 2025 · The average velocity is the rate of change of position over a time interval, while the instantaneous velocity is the rate of change of position at a point in time. As a time interval …

Jul 16, 2010 · I want to know what does velocity really mean in quantum mechanics. Since the particle doesn’t have exact position, how can we talk about the velocity and momentum?

Mar 16, 2006 · One would think that the ball bearing would reach terminal velocity almost immediately after entering the syrup, unless it was at a high temperature, in which case it will …

Mar 17, 2009 · Velocity is the speed at which an object is moving. It can also be thought of as the speed of a moving object divided by the time of travel. In this case, it is the speed of a body …

Mar 15, 2021 · The idea that only relative angular velocity is physically meaningful is very wrong. Angular velocity is not a relative quantity, it is invariant and is easily measured locally with a …

Apr 15, 2020 · I want to clarfiy some ideas, so let us assume an inital observer measures a 4 velocity of an object. . When we calculate the magnitude of the 4-velocity we get, where and …

Jul 8, 2025 · The vacuum-speed-of-light is a scalar invariant under Lorentz transformations, while the 4-velocity is a 4-vector and is therefore not invariant (although the scalar product of two 4 …