A 85.7-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 2.25 m/s2, (b) moving upward at a constant speed, and (c)accelerating downward with an acceleration of 1.35 m/s2?(a) NumberUnits(b) Number | the tolerance is +/-5%Units(c) NumberUnits

Name: A 85.7-kg person stands on a scale in an elevator. What is the appare
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Description: A 85.7-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 2.25 m/s2, (b) moving upward at a constant speed, and (c)accelerating downward with an acceleration o

Answered: A 85.7-kg person stands on a scale in…

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter4: Forces In One Dimension

Section: Chapter Questions

Problem 52A

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A 85.7-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 2.25 m/s2, (b) moving upward at a constant speed, and (c)
accelerating downward with an acceleration of 1.35 m/s2?
(a) Number
Units
(b) Number | the tolerance is +/-5%
Units
(c) Number
Units

Expert Solution

Step 1

Part a:

The weight measured by the scale is the normal force applied by the scale on the person. In the frame of reference of the lift, the person experiences additional pseudoforce equal to mass of the person times the lift’s acceleration.

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