- #1
jisbon
- 476
- 30
- Homework Statement
- Ball of radius 3cm and mass 0.1kg released from rest in liquid. It eventually reaches terminal velocity at 2m/s. What is density of liquid? Give drag force as F=1.9v
- Relevant Equations
- Drag force + pgV = mg
So using FBD, I came out with:
since it reaches terminal velocity, I can assume F=0, thus mg = upthrust +drag
So my density = mg - drag force/g * volume
However the answer seems to be wrong from the answer key I was given. Any ideas why?
Thanks
since it reaches terminal velocity, I can assume F=0, thus mg = upthrust +drag
So my density = mg - drag force/g * volume
However the answer seems to be wrong from the answer key I was given. Any ideas why?
Thanks