A 72-kg man stands on a spring scale in an elevator. Startingfrom rest, the elevator ascends, attaining its maximum speedof 1.2 m/s in 0.80 s. The elevator travels with this constantspeed for 5.0 s, undergoes a uniform negative acceleration for1.5 s, and then comes to rest. What does the spring scale register(a) before the elevator starts to move? (b) During thefirst 0.80 s of the elevator’s ascent? (c) While the elevator istraveling at constant speed? (d) During the elevator’s negativeacceleration?

A 72-kg man stands on a spring scale in an elevator. Startingfrom rest, the elevator ascends, attaining its maximum speedof 1.2 m/s in 0.80 s. The elevator travels with this constantspeed for 5.0 s, undergoes a uniform negative acceleration for1.5 s, and then comes to rest. What does the spring scale register(a) before the elevator starts to move? (b) During thefirst 0.80 s of the elevator’s ascent? (c) While the elevator istraveling at constant speed? (d) During the elevator’s negativeacceleration?

Name: A 72-kg man stands on a spring scale in an elevator. Startingfrom rest
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Description: A 72-kg man stands on a spring scale in an elevator. Startingfrom rest, the elevator ascends, attaining its maximum speedof 1.2 m/s in 0.80 s. The elevator travels with this constantspeed for 5.0 s, undergoes a uniform negative acceleration for1.5 s,

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter6: Applications Of Newton's Laws

Section: Chapter Questions

Problem 40P: A service elevator takes a load of garbage, mass 10.0 kg, from a floor of a skyscraper under...

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Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows:

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OFFON

A 72-kg man stands on a spring scale in an elevator. Starting
from rest, the elevator ascends, attaining its maximum speed
of 1.2 m/s in 0.80 s. The elevator travels with this constant
speed for 5.0 s, undergoes a uniform negative acceleration for
1.5 s, and then comes to rest. What does the spring scale register
(a) before the elevator starts to move? (b) During the
first 0.80 s of the elevator’s ascent? (c) While the elevator is
traveling at constant speed? (d) During the elevator’s negative
acceleration?

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