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s. The elevator takes š e first floor.

s. The elevator takes š e first floor.

College Physics
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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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
Transcribed Image Text: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)
Transcribed Image Text: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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