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, …
Relationship between viscosity and velocity in fluid mechanics
Oct 31, 2022 · The viscous force within a fluid will depend on the velocity gradient (aka shear rate) within the fluid. That does not mean that the viscosity is a function of velocity. Viscosity is …
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 …
Vertical circular motion minimum speed proof - Physics Forums
Nov 21, 2009 · hi, i've read in a lot of places that the minimum speed fora body to "finish" a vertical circle is (rg)^0.5, but I've never understood why.. they assume the...
Relation Between Spring Constant and Angular Velocity
Nov 17, 2015 · I was going through Periodic Motion chapter of my book and came across an equation while defining the relation between Time Period of on oscillating particle and force …
Problem in understanding instantaneous velocity - Physics Forums
Jul 11, 2025 · The average velocity is the rate of change of position over a time interval, while the instantaneous velocity is the rate of change of position at a point in time. As a time interval …
Velocity of an Object Dropped from Height: Law Explained
May 5, 2005 · an increase in the height from which an object is dropped positively correlates with the final velocity of the object as it falls. It has more time to fall, so it will hit at a greater speed. …
Find Velocity given Force and Mass - Physics Forums
Mar 17, 2009 · Velocity is the speed at which an object is moving. It can also be thought of as the speed of a moving object divided by the time of travel. In this case, it is the speed of a body …
Invariance of 4-velocity - Physics Forums
Jul 8, 2025 · The vacuum-speed-of-light is a scalar invariant under Lorentz transformations, while the 4-velocity is a 4-vector and is therefore not invariant (although the scalar product of two 4 …
Relative Velocity of Rain Drops in a Moving Vehicle
Oct 16, 2009 · The velocity of the rain relative to the car is the difference between the velocity of the rain relative to the ground and the velocity of the car relative to the ground.