# Free Fall and air resistance

by hydrogen
Tags: fall, free, resistance
 HW Helper P: 6,205 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.