Velocity of an Object Dropped from Height: Law Explained
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 falls, its potential …
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.
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 …
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 …
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 u = initial velocity, I thought both of …
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. …
Relative Velocity of Rain Drops in a Moving Vehicle
Oct 16, 2009 · The problem involves analyzing the relative velocity of raindrops as observed from a moving vehicle during a rainstorm. The original poster describes two scenarios: driving north at 25 …
At What Velocity Does the Universe Expand and Can It Be Faster than …
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 the …
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 …
Exit velocity of a gas through a hole • Physics Forums
Sep 25, 2016 · The discussion revolves around the exit velocity of gas escaping from a pressurized container through a small hole. Participants explore the relationship between the hole's diameter and …