1. The problem statement, all variables and given/known data A parachutist of mass 65 kg jumps out of a plane deploys a chute. When the chute opens, she slows down from 80km/h to 10km/h in 0.8s. What is the foce of the chute on her shoulders at that time? m = 65 kg v1 = 80km/h → 22 m/s v2 = 10 km/h → 2.8 m/s change in time = 0.8 s 2. Relevant equations a = v/t Fnet = ma 3. The attempt at a solution We're assuming that up is positive. I used to sig figs for all my values. First we need to find the acceleration a = v/t a = (2.8 - 22)/0.8 a = -24 m/s^2 Let Fp = force of the parachute Fnet = ma Fg + Fp = ma -640 + Fp = (65)(-24) -640 + Fp = -1560 Fp = -1560 + 640 Fp = -920 N I'm confused as to what I'm doing wrong. My teacher told us the answer should be about 2200 N and that would be positive while my answer is turning out completely off and negative.