# Free Fall and air resistance

Hey guys,

when an object is free falling, is it still under the effects of air resistance? If it was not under the effects (an environment with out air resistance) is free fall possible? (I am looking for an argument that it is under the effects of free fall but all replies will be taken into consideration)

## Answers and Replies

rock.freak667
Homework Helper
When a body is falling through the air there are three forces acting on it, Weight(W), Friction(F) and upthrust(U).
The resultant force is given by $F_R=W-U-F$, when in free fall the resultant force is zero. So then the air resistance is still there but the weight is numerically equal to the sum of the air resistance and upthrust.

Andy Resnick