Physics for Scientists and Engineers, Technology Update (No access codes included)
9th Edition
ISBN: 9781305116399
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 3, Problem 3.53AP
Review. The biggest stuffed animal in the world is a snake 420 m long, constructed by Norwegian children. Suppose the snake is laid out in a park as shown in Figure P3.39, forming two straight sides of a 105° angle, with one side 240 m long. Olaf and Inge run a race they invent. Inge runs directly from the tail of the snake to its head, and Olaf starts from the same place at the same moment but runs along the snake. (a) If both children run steadily at 12.0 km/h. Inge reaches the head of the snake how much earlier than Olaf? (b) If Inge runs the race again at a constant speed of 12.0 km/h. at what constant speed must Olaf run to reach the end of the snake at the same time as Inge?
Figure P3.39
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The world's largest stuffed animal is a 420-meter-long snake built by Norwegian children. Assume the snake is laid out in a park, as shown in the figure below, forming two straight sides of a 115° angle, one side being 340m long. Olaf and Inge compete in a race they devise. Inge runs directly from the snake's tail to its head, while Olaf starts from the same place but runs along the snake. How much faster does Inge reach the head of the snake than Olaf if both children run steadily at 15.0km/h?
A rectangular parallelepiped has dimensions a, b, and c as
shown in Figure P3.45. (a) Obtain a vector expression for
the face diagonal vector R,. (b) What is the magnitude
of this vector? (c) Notice that R, ck, and R, make a right
triangle. Obtain a vector expression for the body diagonal
vector R2.
b
Ro
R1
Figure P3.45
SVS is running an outdoor skills competition. The race is
made up of three different events that involve a swim, a
climb, and a zip line. You begin at point S. The finish is at
point F, which is 200m from S in a direction 65° north of
west. The first part of the race is a 600m swim to an island,
B, due west of S. The second part is a climb up a vertical
cliff to point C. Point C is at an angle of elevation of 10°, as
seen from point S. The third part is a zip down a zip line
from point C to the finish at point F. You can swim at 1.5m/s,
climb at 0.75m/s, and zip at 15m/s.
Zip ining
a) Label all points S, B, C and F on the diagram below.
[C1]
Climbing
200 m
10
65
600 m
Swimming
b) How long (in minutes) will it take to complete the race? [C2, T8]
Chapter 3 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
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