(a) Explanation Write the expression from kinematics equation of motion. v 2 = v 0 2 + 2 a x (I) Here, v is the peak speed of the elevator moves upward, v 0 is the initial speed of the elevator, a is the acceleration of the accelerator, and x is the distance of the elevator reaches at the midpoint. Rewrite the equation (I) for upward acceleration of the elevator. v 2 − v 0 2 = 2 a up x a up = v 2 − v 0 2 2 x (II) Here, a up is the upward acceleration of the elevator runs. Rewrite the equation (I) for downward acceleration of the elevator. a down = v ′ 2 − v 0 2 2 x (III) Here, a down is the downward acceleration of the elevator runs and v ′ is the peak speed of the elevator moves downward. Conclusion: The height of the each floor of the 101 Taipei Tower building is, h ′ = 509 m 101 = 5.04 m The height of the 89 floor of Tower building is, h 89 = 89 h ′ = 89 ( 5.04 m ) = 448.6 m The height of the midpoint of the elevator runs is, h = 448.6 m 2 = 224.3 m Substitute 1008 m/min for v , 0 m/s for v 0 , and 224.3 m for x in equation (II) to find a up (b) To determine The time period of escalator trip runs up and down.

7th Edition

ISBN: 9780321601834

Author: Jerry D. Wilson, Anthony J. Buffa, Bo Lou

Publisher: Addison-Wesley

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Question

Chapter 2, Problem 80E

(a)

To determine

The acceleration of the elevator runs up and down.

(b)

To determine

The time period of escalator trip runs up and down.

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Chapter 2, Problem 79E

Chapter 2, Problem 81E

Chapter 2 Solutions

College Physics

Ch. 2 - Prob. 1MCQ Ch. 2 - Prob. 2MCQ Ch. 2 - Prob. 3MCQ Ch. 2 - Prob. 4MCQ Ch. 2 - Distance is to displacement as (a) centimeters is...Ch. 2 - Prob. 6MCQ Ch. 2 - Prob. 7MCQ Ch. 2 - A negative acceleration can cause (a) an increase...Ch. 2 - Prob. 9MCQ Ch. 2 - Prob. 10MCQ

Ch. 2 - Prob. 11MCQ Ch. 2 - A car accelerates from 80 km/h to 90 km/h, while a...Ch. 2 - Prob. 13MCQ Ch. 2 - For a constant linear acceleration, the...Ch. 2 - Prob. 15MCQ Ch. 2 - An object is thrown vertically upward. Which of...Ch. 2 - Prob. 17MCQ Ch. 2 - Prob. 18MCQ Ch. 2 - Prob. 19MCQ Ch. 2 - Prob. 20MCQ Ch. 2 - Prob. 1CQ Ch. 2 - Prob. 2CQ Ch. 2 - Prob. 3CQ Ch. 2 - Prob. 4CQ Ch. 2 - Prob. 5CQ Ch. 2 - Prob. 6CQ Ch. 2 - Prob. 7CQ Ch. 2 - Prob. 8CQ Ch. 2 - Prob. 9CQ Ch. 2 - Prob. 10CQ Ch. 2 - Car A is in a straight-line distance d from a...Ch. 2 - Prob. 12CQ Ch. 2 - Prob. 13CQ Ch. 2 - How many variables must be known to solve a...Ch. 2 - Prob. 15CQ Ch. 2 - Prob. 16CQ Ch. 2 - Prob. 17CQ Ch. 2 - Prob. 18CQ Ch. 2 - Prob. 19CQ Ch. 2 - Prob. 20CQ Ch. 2 - What is the magnitude of the displacement of a car...Ch. 2 - Prob. 2E Ch. 2 - Prob. 3E Ch. 2 - Prob. 4E Ch. 2 - Prob. 5E Ch. 2 - Prob. 6E Ch. 2 - Prob. 7E Ch. 2 - Prob. 8E Ch. 2 - The interstate distance between two cities is 150...Ch. 2 - A race car travels a complete lap on a circular...Ch. 2 - A student runs 30 m east, 40 m north, and 50 m...Ch. 2 - A student throws a ball vertically upward such...Ch. 2 - An insect crawls along the edge of a rectangular...Ch. 2 - A plot of position versus time is shown in Fig....Ch. 2 - A high school kicker makes a 30.0-yd field goal...Ch. 2 - Prob. 17E Ch. 2 - Prob. 18E Ch. 2 - Short hair grows at a rate of about 2.0 cm/month....Ch. 2 - A student driving home for the holidays starts at...Ch. 2 - Prob. 21E Ch. 2 - Prob. 22E Ch. 2 - An automobile traveling at 15.0 km/h along a...Ch. 2 - Prob. 24E Ch. 2 - Prob. 25E Ch. 2 - Prob. 26E Ch. 2 - Prob. 27E Ch. 2 - During liftoff, a hot-air balloon accelerates...Ch. 2 - A new-car owner wants to show a friend how fast...Ch. 2 - After landing, a jetliner on a straight runway...Ch. 2 - A train on a straight, level track has an initial...Ch. 2 - A hockey puck sliding along the ice to the left...Ch. 2 - What is the acceleration for each graph segment in...Ch. 2 - Figure 2.24 shows a plot of velocity versus time...Ch. 2 - Prob. 35E Ch. 2 - A train normally travels at a uniform speed of 72...Ch. 2 - Prob. 37E Ch. 2 - A car accelerates from rest at a constant rate of...Ch. 2 - A car traveling at 25 mi/h is to stop on a...Ch. 2 - A motorboat traveling on a straight course slows...Ch. 2 - The driver of a pickup truck going 100 km/h...Ch. 2 - A roller coaster car traveling at a constant speed...Ch. 2 - A rocket car is traveling at a constant speed of...Ch. 2 - Two identical cars capable of accelerating at 3.00...Ch. 2 - According to Newton’s laws of motion (which will...Ch. 2 - An object moves in the +x-direction at a speed of...Ch. 2 - A rifle bullet with a muzzle speed of 330 m/s is...Ch. 2 - The speed limit in a school zone is 40 km/h (about...Ch. 2 - Assuming a reaction time of 0.50 s for the driver...Ch. 2 - Prob. 50E Ch. 2 - Prob. 51E Ch. 2 - An object initially at rest experiences an...Ch. 2 - Prob. 53E Ch. 2 - An object initially at rest experiences an...Ch. 2 - Prob. 55E Ch. 2 - Prob. 56E Ch. 2 - A car accelerates horizontally from rest on a...Ch. 2 - An automobile is traveling on a long, straight...Ch. 2 - A student drops a ball from the top of a tall...Ch. 2 - Prob. 60E Ch. 2 - Prob. 61E Ch. 2 - You can perform a popular trick by dropping a...Ch. 2 - Prob. 63E Ch. 2 - A boy throws a stone straight upward with an...Ch. 2 - In Exercise 64, what would be the maximum height...Ch. 2 - The Petronas Twin Towers in Malaysia and the...Ch. 2 - In an air bag test, a car traveling at 100 km/h is...Ch. 2 - You throw a stone vertically upward with an...Ch. 2 - A Super Ball is dropped from a height of 4.00 m....Ch. 2 - In Fig. 2.25, a student at a window on the second...Ch. 2 - A photographer in a helicopter ascending...Ch. 2 - The acceleration due to gravity on the Moon is...Ch. 2 - It takes 0.210 s for a dropped object to pass a...Ch. 2 - Prob. 74E Ch. 2 - Prob. 75E Ch. 2 - Prob. 76E Ch. 2 - A car and a motorcycle start from rest at the same...Ch. 2 - Prob. 78E Ch. 2 - Prob. 79E Ch. 2 - Prob. 80E Ch. 2 - Prob. 81E Ch. 2 - Prob. 82E Ch. 2 - Prob. 83E Ch. 2 - Prob. 84E Ch. 2 - Prob. 85E Ch. 2 - Prob. 86E Ch. 2 - Prob. 87E Ch. 2 - A Superball is dropped from a height of 2.5 m and...

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