College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
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Textbook Question
Chapter 3, Problem 12PE
Find the components of vtot along a set of perpendicular axes rotated 30° counterclockwise relative to those in Figure 3.57.
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You stand in a flat meadow and observe two cows (see the figure below). Cow A is due north of you and 14.5 m from your position. Cow B is 27.5 m from your position. From your point of view, the angle between cow A and cow B is 17.5°, with cow B appearing to the right of cow A.
(a) How far apart are cow A and cow B? m(b) Consider the view seen by cow A. According to this cow, what is the angle between you and cow B? °(c) Consider the view seen by cow B. According to this cow, what is the angle between you and cow A? Hint: What does the situation look like to a hummingbird hovering above the meadow? °(d) Two stars in the sky appear to be 17.5° apart. Star A is 14.5 ly from the Earth, and star B, appearing to the right of star A, is 27.5 ly from the Earth. To an inhabitant of a planet orbiting star A, what is the angle in the sky between star B and our Sun? °
Given
v = -37 + 87
|ū|
5 making angle 240 degree measured counterclockwise from +x axis.
Find the angle of 27 +3ū. (sketch the plot to help you visualize the problem)
=
(1.35N, 68°) and (1.22N, 291°).
Find the -component of . (Begin by finding the x components of and )
Find the -component of . (Begin by finding the y components of and )
Find the magnitude of . (Use Pythagorean’s theorem)
Find the direction of . (Use any of the trig identities)
Chapter 3 Solutions
College Physics
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