1. The problem statement, all variables and given/known data Jessie (m=56.2 kg) is traveling at a speed of 12.8 m/s at the top of a 19.5-m high roller coaster loop. a) Assuming negligible losses of energy due to friction and air resistance, determine Jessie's total mechanical energy at the bottom of the loop (h=0 m). (ans: 1.53 x 104 J) b) Determine Jessie's speed at the bottom of the loop. (ans: 23.4 m/s) c)What force does Jessie feel from her seat at the bottom of the loop? (ans: 3707N) 2. Relevant equations F=ma ac=v2/r mgh 1/2mv2 3. The attempt at a solution I figured out a) with mgh+1/2mv2=Efinal. I figured out b) with using energy from a) 1.53 x 104= 1/2mv2 But I can't figure out c). I tried using ac=23.42/19.5m to find my acceleration then multiply the mass but the number isn't close to the weight I need.