What if your mass is 75kg. You stand on a scale in an elevator that is about to go down. Starting from rest the elevator accelerates at 2.0ms squared for 2.0s then travels at a constant speed. What do?
While the elevator accelerates downward, you will experience a greater force than your actual weight, resulting in a higher reading on the scale. Once the elevator reaches a constant speed, the scale will show your actual weight, as the net force on you is then equal to your weight.