A 60.0 kg woman on a scale is in an elevator. The combined mass of the elevator and the woman is 815 kg. The elevator accelerated upwards, and during the acceleration, the hoisting cable applies a force of 9410 N. What does the scale read during the acceleration?
F = ma.
Fn = mg + ma
Maybe there's more equations but I'm not sure.
The Attempt at a Solution
Well I first used F = ma to solve for a with F = 9410 and m = 815 kg. a comes out to be 11.5 m/s^2. Then I plugged a into the second equation to get Fn and I got 1280 N, but the answer is 645 N.