1. The problem statement, all variables and given/known data A metal box, attached to a small parachute, is dropped from a helicopter. The total force opposing the motion of the box and parachute at a particular instant during its fall is 30N. The combined mass of the box and parachute is 5.0 kg. Calculate the resultant downward force on the box and parachute (assume g = 10 m/s²). At the end of the fall, the parachute is caught on a tall tree. The box is then cut loose and falls from rest to the ground. The time of fall is 2.4 seconds. Calculate i) the velocity which the box strikes the ground. ii) average velocity during the fall iii) the distance fallen 2. Relevant equations 3. The attempt at a solution I calculated the resultant force of the box and parachute to simply be: F(resultant) -f = ma F(resultant) - 30 ( 5 x 10) F(resultant) = 20N I have also calculated the velocity which the box strikes the ground. i) a = (v-u)/t 10 = v-0/2.4 v =24m/s For the average velocity during the fall, can someone advise me what would it be?