Compute all parts of given question:
Question: A parachutist relies on air resistance (mainly on her parachute) to decrease her downward velocity. She and her parachute have a mass of 55.0kg and air resistance exerts a total upward force of 680N on her and her parachute.
Part A: Calculate the net force on the parachutist.
Part B: Is the net force upward or downward?
Part C: What is the magnitude of acceleration of parachutist?
Part D: Is acceleration upward or downward?
I need help to determine the magnitude of acceleration of parachutist.