COSMIC PERSPECTIVE LL FD
9th Edition
ISBN: 9780135877074
Author: Bennett
Publisher: PEARSON
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Chapter S2, Problem 57EAP
Racing a Light Beam II. Following his humiliation in the first race against the light beam (Problem 56), Jo went into hiding for the next 2 years. By that time, most people had forgotten about both him and the money they had wasted on the pay-per-view event. However, Jo was secretly in training during this time. He worked out hard and tested new performance-enhancing substances. One day, he emerged from hiding and called another press conference. “I’m ready for a rematch,” he announced. Sponsors were few this time and spectators scarce in the huge Olympic stadium where Jo and the flashlight lined up at the starting line. But those who were there will never forget what they saw, although it all happened very quickly. Jo blasted out of the starting block at 99.9% of the
- As seen by spectators in the grandstand, how much faster than Jo is the light beam?
- As seen by Jo, how much faster is the light beam than he is? Explain your answer clearly.
- Using your results from parts a and b, explain why Jo can say that he was beaten just as badly as before, while the spectators can think he gave the light beam a good race.
- Although Jo was disappointed by his performance against the light beam, he did experience one pleasant surprise: The 100-meter course seemed short to him. In Jo’s reference frame during the race, how long was the 100-meter course?
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9. Consider the falling object of mass 10 kg in Example 2, but
assume now that the drag force is proportional to the square of the
velocity.
a. If the limiting velocity is 49 m/s (the same as in Example 2),
show that the equation of motion can be written as
1 (49² - 1²).
245
dy
dt
Also see Problem 21 of Section 1.1.
b. If y(0) = 0, find an expression for v(t) at any time.
Gc. Plot your solution from part b and the solution (26) from
Example 2 on the same axes.
d. Based on your plots in part c, compare the effect of a
quadratic drag force with that of a linear drag force.
e. Find the distance x(t) that the object falls in time t.
Nf. Find the time T it takes the object to fall 300 m.
Chapter S2 Solutions
COSMIC PERSPECTIVE LL FD
Ch. S2 - Prob. 1EAPCh. S2 - Prob. 2EAPCh. S2 - Prob. 3EAPCh. S2 - Prob. 4EAPCh. S2 - Prob. 5EAPCh. S2 - Suppose you see a friend moving by you at some...Ch. S2 - Prob. 7EAPCh. S2 - Prob. 8EAPCh. S2 - Prob. 9EAPCh. S2 - Prob. 10EAP
Ch. S2 - 11. What is mass increase? How does the mass of an...Ch. S2 - Prob. 12EAPCh. S2 - Prob. 13EAPCh. S2 - Prob. 14EAPCh. S2 - Prob. 15EAPCh. S2 - Prob. 16EAPCh. S2 - Prob. 17EAPCh. S2 - Prob. 18EAPCh. S2 - Prob. 19EAPCh. S2 - Prob. 20EAPCh. S2 - Prob. 21EAPCh. S2 - Prob. 22EAPCh. S2 - Prob. 23EAPCh. S2 - Does It Make Sense? Decide whether the statement...Ch. S2 - Does It Make Sense? Decide whether the statement...Ch. S2 - Prob. 26EAPCh. S2 - Prob. 27EAPCh. S2 - Prob. 28EAPCh. S2 - Prob. 29EAPCh. S2 - Prob. 30EAPCh. S2 - Choose the best answer to each of the following....Ch. S2 - Prob. 32EAPCh. S2 - Prob. 33EAPCh. S2 - 34. What provides the strongest evidence that...Ch. S2 - Prob. 35EAPCh. S2 - Prob. 36EAPCh. S2 - Prob. 38EAPCh. S2 - Prob. 39EAPCh. S2 - Prob. 40EAPCh. S2 - Prob. 42EAPCh. S2 - Prob. 43EAPCh. S2 - Prob. 44EAPCh. S2 - Relative Motion Practice II. In all the following,...Ch. S2 - Prob. 46EAPCh. S2 - Prob. 47EAPCh. S2 - Prob. 48EAPCh. S2 - Prob. 49EAPCh. S2 - Time Dilation. A student, after learning about the...Ch. S2 - Length Contraction. Marta has a spaceship that...Ch. S2 - Mass Increase. A spaceship has a rest mass of...Ch. S2 - Time Dilation with Subatomic Particles. A + meson...Ch. S2 - Time Dilation on the Space Station. The...Ch. S2 - Prob. 56EAPCh. S2 - Racing a Light Beam II. Following his humiliation...
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