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  1. Is velocity ever a scalar quantity? - Physics Forums

    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...

  2. Phase and group velocity for the wave function - Physics Forums

    Jul 20, 2025 · 20 TL;DR The relation between the concept and formula for group velocity As far as I know, if we have a wave function as a sum of many momentum eigen function, i.e., …

  3. Understanding Zero Velocity and Non-Zero Acceleration: Explained

    Aug 1, 2009 · I heard it would be possible to have zero velocity & non zero acceleration (I know the opposite situation where there is velocity (constant), but zero acceleration). Could anyone …

  4. Velocity of air coming out of a nozzle - Physics Forums

    May 31, 2013 · If the pressure on one side of the orifice is constant and less than the critical choke pressure, then that should be the velocity. If the pressure is coming from an air tank of …

  5. Calculating Nozzle Flow Rate To work out the flow rate of water from a nozzle we need to work out the volume in a given period of time. To do this we work out the area of the nozzle and …

  6. Addition of Velocities (Velocity Composition) in Special Relativity

    May 20, 2024 · The “Addition of Velocities” formula (more correctly, the “Composition of Velocities” formula) in Special Relativity v A C c = v A B c + v B C c 1 + v A B c v B C c is a …

  7. How to find angular velocity from torque? • Physics Forums

    Sep 6, 2013 · Hello, If I apply force on a rigid cube, I can find the torque τ as: τ = F x r Now, from torque τ I can know about the axis of rotation but how much should I rotate the cube. How can …

  8. Relation Between Spring Constant and Angular Velocity

    Nov 17, 2015 · I was going through Periodic Motion chapter of my book and came across an equation while defining the relation between Time Period of on oscillating particle and force …

  9. Can you have a negative average velocity? • Physics Forums

    Sep 3, 2012 · I understand that it's possible to have a negative instantaneous velocity, but I'm wondering if it's possible to have an negative average velocity. For example, let's say you start …

  10. Learn the Basics of Dimensional Analysis - Physics Forums

    Jul 18, 2019 · The missing quantity is the velocity at which the object travels, which has physical dimension . Let us, therefore, see if we can find a product involving and that has the …