Answer:
A) 800 N
B) 865.28 N
C) 734.28 N
Explanation:
Given,
The weight of the woman, W = 800 N
Therefore, the mass of the women is
m = W/g
= 800/9.8
= 81.53 Kg
A) If the elevator is ascending with a constant velocity, the external acceleration of the body is zero,
Then the elevator readings are
W = mg + ma
= 800 + 0
= 800 N
The elevator reading of the person ascending at constant velocity W = 800 N
B) Ascending at a constant acceleration of 0.8 m/s²
Then the elevator reading are
W = mg + ma
= 800 + (81.65 x 0.8)
= 865.28 N
The elevator reading ascending at constant acceleration is, W = 865.28 N
C) The elevator reading descending at constant acceleration,
W = 800 + (81.65 x 0.8)
= 734.72 N
Hence, the elevator reading descending at constant acceleration is, W = 734.72 N
