A 910 N man stands on a scale in an elevator that is accelerating downward 1.5 m/s^2. What does the scale read in N? If the elevator moves down with max. acceleration, what will the scale read? I started to do this: F = ma 910 N = m(9.8 m/s^2) m = 92.86 kg mg - F_s = ma 910 N - F_s = 92.86 kg*(-1.5 m/s^2) F_s = 139.29 N + 910 N = 1049.29 N But if the acc. is downward, wouldn't the scale have a reading that is < 910? I also don't understand the second part. What is the maximum acc.? Please correct me on my mistakes and help me on the second part. Thanks.