posted by Ben .
A parachutist relies on air resistance (mainly on her parachute) to decrease her downward velocity. She and her parachute have a mass of 55.5kg and air resistance exerts a total upward force of 620N on her and her parachute.
What is the combined weight of the parachutist and parachute?
I've gotten 76.1N (using 9.8) however this answer is wrong
M*g = 543.9 N
It looks like you subtracted 620 N from the weight to get the net upward force. That is not what they asked for.
They only asked for the combined (her and parachute) weight.