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 pocket contains …
Derivation of velocity in nth Bohr orbit • Physics Forums
Mar 17, 2011 · The discussion focuses on deriving the expression for the electron's speed in the nth Bohr orbit, specifically addressing parts (a), (b), and (c) of a homework problem. The key equations …
How Do You Calculate the Muzzle Velocity of a Spring-Loaded Toy Gun ...
Sep 9, 2007 · The discussion revolves around calculating the muzzle velocity of a spring-loaded toy gun that shoots a ball vertically. The problem involves concepts from mechanics, specifically energy …
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 vector …
Understanding Zero Velocity and Non-Zero Acceleration: Explained
Aug 1, 2009 · The discussion centers on the concept of having zero velocity while experiencing non-zero acceleration, exploring various scenarios and interpretations within the context of physics.
Velocity of air coming out of a nozzle - Physics Forums
May 31, 2013 · The discussion revolves around calculating the velocity of air exiting a nozzle connected to a compressed air tank. Participants explore various equations and principles related to …
Calculating Final Velocity on a Ramp - Physics Forums
Feb 14, 2010 · The original poster outlines a method for calculating theoretical acceleration and velocity based on measurements of distance, time, and mass. Some participants suggest alternative …
Why Does Doubling Velocity Increase Kinetic Energy by Four Times?
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 energy. …
Angular Velocity; Given Coefficient of Friction and Radius
Jun 22, 2009 · The discussion revolves around a physics problem involving angular velocity, friction, and centripetal force in the context of a carnival ride. The scenario describes riders standing against the …
Equations for Apollo Spacecraft Orbital Velocity & Moon Escape Velocity
Mar 3, 2014 · The discussion focuses on calculating the orbital velocity of the Apollo spacecraft in a 110-kilometer orbit around the Moon and the escape velocity from the Moon's gravitational field. Key …