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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. 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 …

  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. 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 …

  5. Relationship between viscosity and velocity in fluid mechanics

    Oct 31, 2022 · hello, I read in a lecture paper about fluid mechanics that velocity is not related to viscosity, i found this odd and i think it is an error , can someone...

  6. Difference between angular velocity and angular frequency

    Aug 8, 2018 · I have seen so many questions and confusion about the difference between angular velocity/speed and angular frequency. Usually, answers were always given in the context of …

  7. At What Velocity Does the Universe Expand and Can It Be Faster …

    Feb 9, 2016 · You may sometimes see statements that cosmological inflation caused the universe to expand faster than c, or that the edge of the observable universe occurs at the place where …

  8. Numerade

    Confusing speed with velocity, neglecting the directional component of velocity. Overlooking that deceleration is still a form of acceleration (negative acceleration). Failing to correctly apply the …

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

    Jul 20, 2025 · As far as I know, if we have a wave function as a sum of many momentum eigen function, i.e., ##\\psi=\\sum_k \\alpha_k e^{i(kx-\\omega t)}##, the group velocity is the velocity …

  10. Diving Board Jump: Analyzing Velocity and Height - Physics Forums

    Sep 13, 2013 · Homework Statement A diver jumps off a 3.00 meter high diving board with an initial velocity of 1.75 m/s vertically upward. a) What is the diver's veolcity when she reaches …