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Touger - Introductory Physics (Homework)

James Finch

Physics - College, section 1, Fall 2010

Instructor: Dr. Friendly

Current Score: 0/16

Due: Sunday, December 26, 2010 20:00 EST

About this Assignment

Question
Points
1 2 3 4 5 6
0/3 0/5 0/2 0/3 0/2 0/1
Total
0/16

Description

Here are some textbook questions from Introductory Physics: Building Understanding 1/e by Jerold Touger published by John Wiley & Sons, Inc.

To see a demo of chapter 2 of the online book, click Home and select the Wiley Online Books class from the pulldown menu. If you adopt Touger, your students will see an option to purchase the online book on their WebAssign Homepage.

Click here for a list of all of the questions coded in WebAssign.


Instructions

This demo assignment allows many submissions and allows you to try another version of the same question for practice.



1. –/3 points Notes Question: Touger1 2.P.018.
Question part
Points
Submissions
1 2 3
0/1 0/1 0/1
0/50 0/50 0/50
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0/3
 
A storm front advances eastward at a constant speed of 9.2 km/h. A meteorologist notes from satellite photos that at t = 2.8 h, the storm front has reached a point 12.8 km east of his weather station.
(a) Where was the storm front at t = 0?
Enter a number.
 km
(b) If the weather station is at x = 0, what is the value of the vertical intercept of a graph of x versus t?
Enter a number.
 km

2. –/5 points Notes Question: Touger1 2.P.062.
Question part
Points
Submissions
1 2 3 4 5
0/1 0/1 0/1 0/1 0/1
0/50 0/50 0/50 0/50 0/50
Total
0/5
 
An assembly line worker runs to get a replacement part (110 m away) in 13 s and then takes 22 s to run back again. Find his average velocity for the following cases. (Assume he starts running in the positive direction.)
(a) for the first 110 m
Enter a number.
 m/s
(b) for the second 110 m
Enter a number.
 m/s
(c) for the total run
Enter an exact number.
 m/s
(d) Do you get the answer to (c) if you just average your answers to (a) and (b)?
    


Explain why or why not.


3. –/2 points Notes Question: Touger1 2.P.098.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
Total
0/2
 
The hand in Figure 2-45 rolls the ball up the ramp, releasing it at point A at t = 0. The ball gets as far as point B before coming back down. Assume the marks on the ramp are 0.25 m apart.


Figure 2.45

(a) find the ball's acceleration (Use v_A for vA.)
Enter a mathematical expression.
Click here to preview your answer. m/s2
(b) find the velocity with which the ball reaches the bottom of the ramp
Enter a mathematical expression.
Click here to preview your answer. m/s
Click here for help with symbolic formatting.


4. –/3 points Notes Question: Touger1 4.P.042.
Question part
Points
Submissions
1 2 3
0/1 0/1 0/1
0/50 0/50 0/50
Total
0/3
 
A spacecraft viewed from above is initially drifting in the direction shown in the figure. Exhaust jets on the rocket (A, B, C, and D) may be fired singly or in combination to alter the rocket's motion. Assume the firings are of short duration.


Figure 4-20

(a) If the rocket is to reverse direction, which exhaust jet(s) must be fired? (Select all that apply.)



(b) If the rocket's final direction is to be toward the lower left corner of the page (as viewed from above), which exhaust jet(s) must be fired? (Select all that apply.)



(c) If the rocket's final direction is to be straight down toward the bottom of the page (as viewed from above), which exhaust jet(s) must be fired?(Select all that apply.)




5. –/2 points Notes Question: Touger1 24.P.004.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
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0/2
 
As described by a stationary observer, the crests of a wave are traveling at speed vwave in the direction shown in Figure 24-19. Observers A, B, and C are all traveling at the same slower speed but in different directions: A is traveling toward the top of the page, B toward the bottom, and C toward the left. Rank these three observers from greatest to least, making sure to indicate any equalities (use only the symbols > or =, for example C= A>B), in order of the wave speed that each sees if the wave is
(a) a water wave.
Answer is not case sensitive.

(b) a light wave.
Answer is not case sensitive.


Figure 24-19



6. –/1 points Notes Question: Touger1 25.P.010.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
(Choose all correct answers.) Observers A and B both witness the motion of the two billiard balls in Figure 25-19. Both observers' reference frames are inertial reference frames.


Figure 25-19

The two observers must agree on whether



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