-Physician
- 85
- 0
Homework Statement
In formula of air friction ##f_{air}=-bv##
v is velocity but what's b?
-Physician said:In this formula v is not squared. but if b is coefficient, how would we win Newton for friction
coefficient =0.3 (example)
v=3m/s
##f_{air}=-bv=(-0.3)(3m/s)## gives us m/s , but not Newton?
gneill said:Replace all the variables that you know the units for with their units (so for example v → m/s, f → N). Solve the resulting expression for the "unknown" variable. In this case solve for b. You should have b on the left and its units on the right.
LawrenceC said:In your formula, b would be a coefficient that includes things like drag coefficient, air density, and frontal image area. Usually though, the force is represented by v^2, not simply v. [PLAIN]http://www.vvio.info/jpg1[/QUOTE]
In your formula, b would be a coefficient that includes things like drag coefficient
shiliangtu said:In your formula, b would be a coefficient that includes things like drag coefficient
shiliangtu said:In your formula, b would be a coefficient that includes things like drag coefficient
-Physician said:If that would be mass divided by time , then we would have
##f=\frac{mv}{t}##, but that's the force formula, even friction is a kind of force, would that be friction's formula as well?
-Physician said:By that I understand that none answered my question, what is b , just simply and what is it equal to?
It looks like there have been some very good posts here, but you don't like the answers.-Physician said:By that I understand that none answered my question, what is b , just simply and what is it equal to?