Relationship between viscosity and velocity in fluid mechanics
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 …
Phase and group velocity for the wave function - Physics Forums
Jul 20, 2025 · Since the phase velocity is linear in , , the group velocity is an average of all the phase velocities in the wave pocket. This turns out true in the simplest case which wave …
Is velocity ever a scalar quantity? • Physics Forums
Dec 27, 2024 · Velocity is fundamentally a vector quantity, possessing both magnitude and direction, while speed is a scalar representing only magnitude. In the context of the SUVAT …
Velocity divided by Acceleration gives distance? - Physics Forums
Jun 24, 2016 · Velocity divided by acceleration does not yield distance, as the units do not align correctly. The discussion highlights a common confusion between the symbol 's' representing …
Understanding Zero Velocity and Non-Zero Acceleration: Explained
Aug 1, 2009 · Zero velocity can occur at a single instant while acceleration remains non-zero, as demonstrated by a ball thrown upwards that momentarily stops at its peak height. Throughout …
Terminal velocity in a vacuum? - Physics Forums
Sep 23, 2014 · An object "dropped" onto the Earth would be able to achieve a calculable terminal velocity ( at impact with the Earth the velocity would be maximum through a tube of vacuum ) …
Exit velocity of a gas through a hole • Physics Forums
Sep 25, 2016 · The discussion centers on the relationship between the exit velocity of gas and the diameter of a hole in a pressurized container. Initially, it was suggested that the exit velocity …
Is Velocity Increasing or Decreasing with Negative Acceleration?
Aug 15, 2017 · Velocity is made up of two components magnitude (speed) and direction. So, in the simplest case, if the magnitude changes but the direction is the same, then I would think it …
Final velocity of a ball down a ramp. - Physics Forums
Jan 16, 2015 · Ignoring the fact that it's a ball for the moment, just treating it as a zero friction ramp, those (that) equation only tells you the final velocity. It doesn't tell you how long it takes …
Why is angular velocity perpendicular to the plane of rotation?
May 22, 2014 · Angular velocity points perpendicular to the plane of rotation because it represents the axis around which the rotation occurs, providing a clear and consistent way to describe the …