Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN: 9781133939146

Author: Katz, Debora M.

Publisher: Cengage Learning

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Textbook Question

Chapter 2, Problem 9PQ

Elisha Graves Otis invented the elevator brake in the mid-1800s, making it possible to build tall skyscrapers with fast elevators. Today’s skyscrapers are a large fraction of a mile tall; for example. Taipei 101 in Taiwan has 101 stories and is 515 m (0.32 miles) tall. The top speed of the elevator in the Taipei 101 tower is roughly three times greater than the ascent rate of a commercial jet airplane. The position and time data in the table are based on such an elevator.

a. Working in SI units, make a position-versus-time graph for the elevator. (You may wish to use a spreadsheet program.)

b. Describe the motion of the elevator in words.

c. Find the highest speed of the elevator. When is the elevator going at this speed?

d. What sort of considerations would the engineers need to make to ensure the comfort of the passengers?

Chapter 2, Problem 9PQ, Elisha Graves Otis invented the elevator brake in the mid-1800s, making it possible to build tall

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Chapter 2, Problem 8PQ

Chapter 2, Problem 10PQ

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Chapter 2 Solutions

Physics for Scientists and Engineers: Foundations and Connections

Ch. 2.2 - In each of the five motion diagrams shown in...Ch. 2.3 - For each of the following, give the vector...Ch. 2.5 - Figure 2.11 shows the motion of various objects:...Ch. 2.6 - The top marathon runners complete the race in...Ch. 2.6 - In our everyday experience, we sometimes use the...Ch. 2.6 - Prob. 2.6CE Ch. 2.8 - Kinematics graphs are great for showing how a...Ch. 2 - Is the Moons motion around the Earth...Ch. 2 - An animals tracks are frozen in the snow (Fig....Ch. 2 - Problems 3 and 12 are paired. G A particle moves...

Ch. 2 - Prob. 4PQ Ch. 2 - For each of the following velocity vectors, give...Ch. 2 - In the traditional Hansel and Gretel fable, the...Ch. 2 - After a long and grueling race, two cadets, A and...Ch. 2 - Prob. 8PQ Ch. 2 - Elisha Graves Otis invented the elevator brake in...Ch. 2 - As shown in Figure 2.9, Whipple chose a coordinate...Ch. 2 - Prob. 11PQ Ch. 2 - Prob. 12PQ Ch. 2 - A race car travels 825 km around a circular sprint...Ch. 2 - Prob. 14PQ Ch. 2 - A train leaving Albuquerque travels 293 miles, due...Ch. 2 - Prob. 16PQ Ch. 2 - The position of a particle attached to a vertical...Ch. 2 - Prob. 18PQ Ch. 2 - Prob. 19PQ Ch. 2 - Prob. 20PQ Ch. 2 - During a relay race, you run the first leg of the...Ch. 2 - Prob. 22PQ Ch. 2 - Prob. 23PQ Ch. 2 - Prob. 24PQ Ch. 2 - During a thunderstorm, a frightened child is...Ch. 2 - Scientists and engineers must interpret problems...Ch. 2 - Prob. 27PQ Ch. 2 - Prob. 28PQ Ch. 2 - A In attempting to break one of his many swimming...Ch. 2 - A The instantaneous speed of a particle moving...Ch. 2 - A particles velocity is given by vy(t)=atj, where...Ch. 2 - Prob. 32PQ Ch. 2 - Figure P2.33 shows the y-position (in blue) of a...Ch. 2 - A particles position is given by z(t) = (7.50...Ch. 2 - Prob. 35PQ Ch. 2 - Two sprinters start a race along a straight track...Ch. 2 - An electronic line judge camera captures the...Ch. 2 - During a bungee jump, a student (i) initially...Ch. 2 - Prob. 39PQ Ch. 2 - Prob. 40PQ Ch. 2 - Prob. 41PQ Ch. 2 - Prob. 42PQ Ch. 2 - Prob. 43PQ Ch. 2 - Prob. 44PQ Ch. 2 - A computer system, using a preset coordinate...Ch. 2 - In Example 2.6, we considered a simple model for a...Ch. 2 - A uniformly accelerating rocket is found to have a...Ch. 2 - Prob. 48PQ Ch. 2 - A driver uniformly accelerates his car such that...Ch. 2 - Car A and car B travel in the same direction along...Ch. 2 - Accelerating uniformly to overtake a slow-moving...Ch. 2 - An object that moves in one dimension has the...Ch. 2 - A particle moves along the positive x axis with a...Ch. 2 - Case Study Crall and Whipple attached a fan to a...Ch. 2 - Prob. 55PQ Ch. 2 - The engineer of an intercity train observes a rock...Ch. 2 - A pebble is thrown downward from a 44.0-m-high...Ch. 2 - In a cartoon program, Peter tosses his baby,...Ch. 2 - Tadeh launches a model rocket straight up from his...Ch. 2 - Prob. 60PQ Ch. 2 - In the movie Star Wars: The Empire Strikes Back,...Ch. 2 - A worker tosses bricks one by one to a coworker on...Ch. 2 - A rock is thrown straight up into the air with an...Ch. 2 - Prob. 64PQ Ch. 2 - A sounding rocket, launched vertically upward with...Ch. 2 - Prob. 66PQ Ch. 2 - While strolling downtown on a Saturday Afternoon,...Ch. 2 - Prob. 68PQ Ch. 2 - A trooper is moving due south along the freeway at...Ch. 2 - A dancer moves in one dimension back and forth...Ch. 2 - The electrical impulse initiated by the nerves in...Ch. 2 - Two cars leave Seattle at the same time en route...Ch. 2 - An object begins to move along the y axis and its...Ch. 2 - Prob. 74PQ Ch. 2 - Prob. 75PQ Ch. 2 - Two carts are set in motion at t = 0 on a...Ch. 2 - Prob. 77PQ Ch. 2 - Cars A and B each move to the right with constant...Ch. 2 - Prob. 79PQ Ch. 2 - Prob. 80PQ Ch. 2 - Prob. 82PQ Ch. 2 - Prob. 83PQ Ch. 2 - A Write expressions for the average acceleration...Ch. 2 - Prob. 85PQ Ch. 2 - Prob. 86PQ Ch. 2 - In 1898, the world land speed record was set by...Ch. 2 - In Example 2.12, two circus performers rehearse a...Ch. 2 - Prob. 89PQ

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Solution Summary: The author plots the position-time graph for the elevator movement. The elevator's speed increases gradually, while its slope is constant, and the maximum speed is the slope.

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