A student stands on a scale inside an elevator that is moving upward but slowing down at

PHYSICS · Single correct · CBSE · Physics · Exploring Forces · Exploring Forces

Problem

70\,\text{kg}

student stands on a scale inside an elevator that is moving upward but slowing down at

2.0\,\text{m/s}^2

. Which of the following best describes the relationship between the upward normal force

N

exerted by the scale and the student’s weight

W

at this instant? (a)

N

is greater than

W

70\,\text{kg}\times2.0\,\text{m/s}^2

(b)

N

is equal in magnitude to

W

(c)

N

is less than

W

70\,\text{kg}\times2.0\,\text{m/s}^2

(d)

N

is less than

W

70\,\text{kg}\times7.8\,\text{m/s}^2