A woman of mass 51 kg is standing in an elevator. If the elevator floor pushes up on her feet with a force of 405 N, what is the acceleration of the elevator? ______m/s2 down So far I've used the F=ma equations and I've gotten 7.94 m/s which was wrong and then I figured maybe it was negative since its down and submitted -7.94. Then some how I redid it and got 27.. not sure where that came from but I'm at a loss and I need an answer within an hour. Can someone get to the bottom of this for me? I don't understand why the first solution I got was wrong. Help! Thanks!