View Single Post
pjordan
#1
Dec6-12, 01:46 PM
P: 3
Hi. Consider the basic eq for a falling body with air resistance

dv/dt=g-kv/m

I dont understand air resistance as a force, since it seems irreconcilable to the force equation F=ma. How is a force a function of velocity? I am also not sure how this equation makes sense in terms of dimensional anaysis--the right side is m/s^2, the left m/s^2+(m/s)/kg. I am apparently the only one troubled by this, as extensive googling has yeilded nothing. Thanks!
Phys.Org News Partner Physics news on Phys.org
IHEP in China has ambitions for Higgs factory
The physics of lead guitar playing
The birth of topological spintronics