A 140-lb person is standing on a bathroom scale in an elevator as the elevator accelerates downward 1.2 m/s2 What does the bathroom scale read?
Answer is 120 lbs.
Please show step by step solution to this problem.
1 lb = 0.4536 kg
140 lb = 63.504 kg
now, as the elevator moving downwards
W = m ( g - a)
W = 63.504* ( 9.8 + 1.2)
W = 546.134 N
W = 546.134 / ( 9.8 *0.467)
W = 119.332 lb ≈ 120 lb
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