1. The problem statement, all variables and given/known data A parachutist, after jumping from the plane, is accelerating down with average acceleration of 1.6 m/s2 (relative to the ground). What is the force of friction slowing his motion is mass of the parachutist with his equipment is 124 kg? What is the frictional force when the parachutist reaches terminal velocity? 2. Relevant equations F = ma 3. The attempt at a solution F=ma F=124 kg x 1.6 m/s2 F= 199.36 N [down] Would the force of friction also be 199.36 N except in [up] direction because for every action there is an equal and opposite reaction? What happens when he reaches terminal velocity? Wouldn't acceleration = 0 and cause force unbalance to equal to 0. Doesn't this mean the two forces of gravity and friction are equal but in opposite direction? So how do I find the frictional force upwards during terminal velocity?