The discussion centers on the physical entity represented by the ratio of mass or mass density to the square of speed, specifically in the context of projectile motion. A key conclusion is that this ratio serves as a figure of merit for the deceleration of a bullet, where higher values indicate greater effective inertia against air resistance. The participants express a lack of clarity regarding practical applications and references for this quantity, highlighting a need for further exploration of its significance in physics.
PREREQUISITESPhysics students, engineers, and anyone interested in the dynamics of projectile motion and the effects of air resistance on moving objects.
Massdensity per speedquadrat. What else?simplemind said:TL;DR Summary: i try to understand what physical entity mass or massdensity divided by speedquadrat could be?
Any ideas?
thanks
i try to understand what physical entity mass or massdensity divided by speedquadrat could be?
Any ideas?
thanks
For a given projectile shape (fixed cross section and coefficient of drag), mass divided by the square of speed would be a good figure of merit for the decelleration of a bullet.simplemind said:i try to understand what physical entity mass or massdensity divided by speedquadrat could be?
and meters per seconds is meters per seconds. what else :-)kuruman said:Massdensity per speedquadrat. What else?
vanhees71 said:I've no clue, what such a quantity would be good for. Do you have a reference, where it is used?