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 …

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, …

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 …

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 …

Feb 10, 2022 · The discussion centers on the relationship between mass, velocity, and force, emphasizing that momentum is a vector quantity defined by the equation F = dp/dt. It is …

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 …

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 …

May 16, 2015 · The concept of instantaneous velocity is also mentioned, which applies to specific moments along the path. This reinforces the principle that average velocity is zero when …

Dec 16, 2004 · The discussion centers on the relationship between velocity and kinetic energy, specifically why doubling the velocity of an object results in a fourfold increase in kinetic …

Apr 20, 2014 · This discussion focuses on estimating the time it takes for a person to reach terminal velocity while falling in Earth's gravitational field, considering factors such as body …