You are in an elevator that is accelerating upwards at 2m/s^2. If your mass is 70kg, what is the normal force pushing on you by the floor of the elevator?

Question

A. 70N
B. 690N
C. 830N

Please give the correct answer and an explanation as to why its correct.

Answer 1

with zero acceleration, F=mg due to gravity.

Now add F=ma due to the upward acceleration.