University Physics (14th Edition)
14th Edition
ISBN: 9780133969290
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Textbook Question
Chapter 5, Problem 5.111P
DATA You are an engineer working for a manufacturing company. You are designing a mechanism that uses a cable to drag heavy metal blocks a distance of 8.00 m along a ramp that is sloped at 40.0° above the horizontal. The coefficient of kinetic friction between these blocks and the incline is μk = 0.350. Each block has a mass of 2170 kg. The block will be placed on the bottom of the ramp, the cable will be attached, and the block will then be given just enough of a momentary push to overcome static friction. The block is then to accelerate at a constant rate to move the 8.00 m in 4.20 s. The cable is made of wire rope and is parallel to the ramp surface. The table gives the breaking strength of the cable as a function of its diameter; the safe load tension, which is 20% of the breaking strength; and the mass per meter of the cable:
Source: www.engineeringtoolbox.com
(a) What is the minimum diameter of the cable that can be used to pull a block up the ramp without exceeding the safe load value of the tension in the cable? Ignore the mass of the cable, and select the diameter from those listed in the table. (b) You need to know safe load values for diameters that aren’t in the table, so you hypothesize that the breaking strength and safe load limit are proportional to the cross-sectional area of the cable. Draw a graph that tests this hypothesis, and discuss its accuracy. What is your estimate of the safe load value for a cable with diameter
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Lab-Based Section
Use the following information to answer the lab based scenario.
A student performed an experiment in an attempt to determine the index of refraction of glass.
The student used a laser and a protractor to measure a variety of angles of incidence and
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Angle of
Incidence (°)
Angle of
Refraction (º)
20
11
30
19
40
26
50
31
60
36
70
38
2a) By hand (i.e., without using computer software), create a linear graph on graph paper
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2b) Graphically determine the index of refraction of the semi-circular glass prism, rounding your
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Chapter 5 Solutions
University Physics (14th Edition)
Ch. 5 - A man sits in a seat that is hanging from a rope....Ch. 5 - In general, the normal force is not equal to the...Ch. 5 - A clothesline hangs between two poles. No matter...Ch. 5 - You drive a car up a steep hill at constant speed....Ch. 5 - For medical reasons, astronauts in outer space...Ch. 5 - To push a box up a ramp, which requires less...Ch. 5 - A woman in an elevator lets go of her briefcase,...Ch. 5 - A block rests on an inclined plane with enough...Ch. 5 - A crate slides up an inclined ramp and then slides...Ch. 5 - A crate of books rests on a level floor. To move...
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