College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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1. The president's airplane, Air Force One, flies at 250 m/s to the
east with respect to the air. The air is moving at 35 m/s to the
north with respect to the ground. Find the velocity of Air Force
One with respect to the ground.
252 m/s
c. 222 m/s
b. 435 m/s
d. 125 m/s
2.A motorboat, which has a speed of 5 meters per second in still
water, is headed east as it crosses a river flowing south at 3.3
meters per second. What is the magnitude of the boat's
resultant velocity with respect to the starting point?
C. 5 m/s
b. 6 m/s
d. 8.3 m/s
a. 3.3 m/s
3. A person observes a fireworks display from a safe distance of
0.750 kilometer. Assuming that sound travels at 340 meters per
second in air, what is the time between the person seeing and
hearing a fireworks explosion?
a. 0.453 S
c. 2.21 s
b..410 s
d. 255,000 S
4. A child walks 5 meters north, then 4 meters east, and finally 2
meters south. What is the magnitude of the resultant
displacement of the child after the entire walk?
a. 1 m
c. 5 m
b. 3 m
d. 11 m
5.An object is shot from the ground (at 25 m/s) at 25 degrees and
65 degrees. Which one has the greater range? (assume no air
resistance)
a. 25 degrees
c. 65 degrees
b. Same for both
d. none of the above
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