University Physics Volume 1
18th Edition
ISBN: 9781938168277
Author: William Moebs, Samuel J. Ling, Jeff Sanny
Publisher: OpenStax - Rice University
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Textbook Question
Chapter 2, Problem 81AP
If the velocity vector of a polar bear is
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Check out a sample textbook solutionStudents have asked these similar questions
As it passes over Grand Bahama Island, the eye of a hurricane is moving in a direction 63.0° north of west with a speed of 40.2 km/h. (Let i represent
east and j represent north.)
(a) What is the unit-vector expression for the velocity of the hurricane?
km/h i+
km/hi
It maintains this velocity for 3.50 h, at which time the course of the hurricane suddenly shifts due north, and its speed slows to a constant 25.2 km/h.
This new velocity is maintained for 1.50 h.
(b) What is the unit-vector expression for the new velocity of the hurricane?
km/h j
km/h i+
(c) What is the unit-vector expression for the displacement of the hurricane during the first 3.50 h?
km i+
km j
(d) What is the unit-vector expression for the displacement of the hurricane during the latter 1.50 h?
km i+
km j
(e) How far from Grand Bahama is the eye 5.00 h after it passes over the island?
km
If the velocity vector of a polar bear is u ⃗ = (−18.0i ^ − 13.0j ^ )km/h , how fast and in what geographic direction is it heading? Here, i ^ and j ^ are directions to geographic east and north, respectively.
For plane curvilinear motion with the displacement, r, expressed in polar coordinates as r =re, where e, is the unit vector in the
outward radial direction and egis the vector normal to the radial direction, the velocity is given as:
O v = re, –
- rde,
O v = reg + rle,
O v = re, + rðe,
O v = re, + r0eo
Chapter 2 Solutions
University Physics Volume 1
Ch. 2 - Check Your Understanding Two motorboats named...Ch. 2 - Check Your Understanding A cave diver enters a...Ch. 2 - Check Your understanding Using the three...Ch. 2 - Check your Understanding A blue fly lands on a...Ch. 2 - Check Your Understanding If the displacement...Ch. 2 - Check Your Understanding If Trooper runs 20 m west...Ch. 2 - Check Your Understanding If the average velocity...Ch. 2 - Check Your understanding Three displacement...Ch. 2 - Check Your Understanding Suppose that Balto in...Ch. 2 - Check Your Understanding Verify that vector v V...
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Is it necessary to...Ch. 2 - Can a magnitude of a vector be negative?Ch. 2 - Can the magnitude of a particle’s displacement be...Ch. 2 - If two vectors are equal, what can you say about...Ch. 2 - If three vectors sum up to zero, si1at geometric...Ch. 2 - Give an example of a nonzero vector that has a...Ch. 2 - Explain why a vector cannot have a component...Ch. 2 - If two vectors are equal, what can you say about...Ch. 2 - If vectors A and B are orthogonal, what is the...Ch. 2 - If one of the two components of a vector is not...Ch. 2 - If two vectors have the same magnitude, do their...Ch. 2 - What is wrong with the following expressions? 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(b) If AF=BF...Ch. 2 - You fly 32.0 km in a straight line in still air in...Ch. 2 - Rectangular coordinates of a point are given by...Ch. 2 - If the polar coordinates of a point are (r,)and...Ch. 2 - Prob. 74APCh. 2 - Starting at the island of Moi in an unknown...Ch. 2 - An air traffic controller notices two signals from...Ch. 2 - Show that when A+B=C then A2+B2+2ABcos , where is...Ch. 2 - Four force vectors each have the same magnitude...Ch. 2 - A skater glides along a circular path of radius...Ch. 2 - A stubborn dog is being walked on a leash by its...Ch. 2 - If the velocity vector of a polar bear is u=(-18.0...Ch. 2 - Find the scalar components of three-dimensional...Ch. 2 - A diver explores a shallow reef off the coast of...Ch. 2 - A force vector A has x and y components,...Ch. 2 - Vectors A and B are two orthogonal vectors in the...Ch. 2 - For the three-dimensional vectors in the following...Ch. 2 - Show that (BC)A is the volume of the...Ch. 2 - Vector B is 5.0 cm long and vector A is 4.0 cm...Ch. 2 - What is the component of the force vector G=(3.0...Ch. 2 - The following figure shows a triangle formed by...Ch. 2 - between points in a plane do not change when a...
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