please i need help with both of them, Thank you I Review ConstantsZach, whose mass is 84 kg, is in an elevatordescending at 9 m/s. The elevator takes 3.1 s toPart Bbrake to a stop at the first floor.What is Zach's weight while the elevator is braking?Express your answer with the appropriate units.HA?1016.25w =SSubmitPrevious Answers Request AnswerX Incorrect; Try Again; 2 attempts remaining I Review | ConstantsTwo bicycle tires are set rolling with the same initialspeed of 3.9 m/s along a long, straight road, andthe distance each travels before its speed isreduced by half is measured. One tire is inflated toa pressure of 40 psi and goes a distance of 18.6 m; the other is at 105 psi and goes a distance of 92.4m . Assume that the net horizontal force is due torolling friction only and take the free-fallacceleration to be g = 9.8 m/s?.Part AWhat is the coefficient of rolling friction ur for the tire under low pressure?• View Available Hint(s)Hr =SubmitPart B Complete previous part(s)

Answered: Image /qna-images/answer/587b12a9-3463-466c-a884-0a87c3531a0a.jpg

Answered: s. The elevator takes š e first floor.

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Physics

s. The elevator takes š e first floor.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

please i need help with both of them, Thank you

I Review Constants
Zach, whose mass is 84 kg, is in an elevator
descending at 9 m/s. The elevator takes 3.1 s to
Part B
brake to a stop at the first floor.
What is Zach's weight while the elevator is braking?
Express your answer with the appropriate units.
HA
?
1016.25
w =
S
Submit
Previous Answers Request Answer
X Incorrect; Try Again; 2 attempts remaining

I Review | Constants
Two bicycle tires are set rolling with the same initial
speed of 3.9 m/s along a long, straight road, and
the distance each travels before its speed is
reduced by half is measured. One tire is inflated to
a pressure of 40 psi and goes a distance of 18.6 m
; the other is at 105 psi and goes a distance of 92.4
m . Assume that the net horizontal force is due to
rolling friction only and take the free-fall
acceleration to be g = 9.8 m/s?.
Part A
What is the coefficient of rolling friction ur for the tire under low pressure?
• View Available Hint(s)
Hr =
Submit
Part B Complete previous part(s)

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