Jul 20, 2025 · As far as I know, if we have a wave function as a sum of many momentum eigen function, i.e., ψ = ∑ k α k e i (k x ω t), the group velocity is the velocity of the whole wave …

Oct 31, 2022 · The relationship between viscosity and velocity in fluid mechanics is clarified: viscosity is an intrinsic property of a fluid that remains constant regardless of the flow velocity. …

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, …

Sep 9, 2008 · The discussion clarifies the relationship between torque, power, and angular velocity, emphasizing that power is equal to torque multiplied by angular velocity (P = τ × ω). It …

Aug 1, 2009 · The key takeaway is that instantaneous velocity can be zero at specific moments, while acceleration remains non-zero, highlighting a common misconception in understanding …

Jul 9, 2021 · The discussion clarifies the distinction between average speed and average velocity, emphasizing that average speed is defined as total distance divided by total time, while …

Sep 3, 2012 · Negative average velocity is achievable in a multi-dimensional context, particularly when considering directional movement. For instance, if a vehicle travels north at 10 mph for …

Mar 2, 2010 · The equation for linear velocity, represented as v = r (ω), establishes that velocity is directly proportional to the radius (r) and the angular velocity (ω) measured in radians per …

May 5, 2005 · The discussion clarifies that the velocity of an object dropped from a height positively correlates with the height due to the Law of Conservation of Energy. As an object …

Jul 13, 2016 · Changing direction while in motion does affect velocity, as velocity is a vector quantity that includes both speed and direction. When an object, such as a weight swung in a …