(III) An automobile traveling 95 km/h overtakes a 1.30-km- long train traveling in the same direction on a track parallel g to the road. If the train's speed is 75 km/h, how long does it take the car to pass it, and how far will the car have traveled in this time? See Fig. 2-36. What are the results if the car and train are traveling in opposite directions? -1.30 km v = 75 km/h v = 95 km/h
(III) An automobile traveling 95 km/h overtakes a 1.30-km- long train traveling in the same direction on a track parallel g to the road. If the train's speed is 75 km/h, how long does it take the car to pass it, and how far will the car have traveled in this time? See Fig. 2-36. What are the results if the car and train are traveling in opposite directions? -1.30 km v = 75 km/h v = 95 km/h
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
Related questions
Question
Q16
![nd
14. (II) Digital bits on a 12.0-cm diameter audio CD are
along an outward spiraling path that starts at radius
R1 = 2.5 cm and finishes at radius R, = 5.8 cm. The
distance between the centers of neighboring spiral-
windings is 1.6 µm (= 1.6 x 10-6 m). (a) Determine the
total length of the spiraling path. [Hint: Imagine "unwinding"
the spiral into a straight path of width 1.6 um, and note
that the original spiral and the straight path both occupy
the same area.] (b) To read information, a CD player
adjusts the rotation of the CD so that the player's readout
laser moves along the spiral path at a constant speed of
about 1.2 m/s. Estimate the maximum playing time of such
a CD.
ing
to
at
eity
eed
cm
its
fly
15. (III) A bowling ball traveling with constant speed hits the
pins at the end of a bowling lane 16.5 m long. The bowler
hears the sound of the ball hitting the pins 2.80 s after the
ball is released from his hands. What is the speed of the
ball, assuming the speed of sound is 340 m/s?
nld *16. (III) An automobile traveling 95 km/h overtakes a 1.30-km-
long train traveling in the same direction on a track parallel g/
to the road. If the train's speed is 75 km/h, how long does
it take the car to pass it, and how far will the car have
traveled in this time? See Fig. 2-36. What are the results
if the car and train are traveling in opposite directions?
nds
ves
the
ate
at
ow
ow
pur
-1.30 km
ght
otly
age
ing
v = 75 km/h
= 95 km/h
D-m
age
FIGURE 2-36 Problem 16.
2-4 Acceleration
the
17. (I) A sports car accelerates from rest to 95 km/h in 4.3 s.
What is its average acceleration in m/s2?
18. (I) A sprinter accelerates from rest to 9.00 m/s in 1.38 s.
What is her acceleration in (a) m/s²; (b) km/h²?
rav-
the
of a
a is
and
19. (II) A sports car moving at constant velocity travels 120 m
in 5.0 s. If it then brakes and comes to a stop in 4.0 s, what
is the magnitude of its acceleration (assumed constant) in
m/s, and in g's (g = 9.80 m/s²)?
Problems 43](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb30812a9-7aa5-48bf-8259-cbc7fefe4ca6%2Fd8e66e55-35c9-436a-a45d-b92389d52524%2Fcvx15rp_processed.jpeg&w=3840&q=75)
Transcribed Image Text:nd
14. (II) Digital bits on a 12.0-cm diameter audio CD are
along an outward spiraling path that starts at radius
R1 = 2.5 cm and finishes at radius R, = 5.8 cm. The
distance between the centers of neighboring spiral-
windings is 1.6 µm (= 1.6 x 10-6 m). (a) Determine the
total length of the spiraling path. [Hint: Imagine "unwinding"
the spiral into a straight path of width 1.6 um, and note
that the original spiral and the straight path both occupy
the same area.] (b) To read information, a CD player
adjusts the rotation of the CD so that the player's readout
laser moves along the spiral path at a constant speed of
about 1.2 m/s. Estimate the maximum playing time of such
a CD.
ing
to
at
eity
eed
cm
its
fly
15. (III) A bowling ball traveling with constant speed hits the
pins at the end of a bowling lane 16.5 m long. The bowler
hears the sound of the ball hitting the pins 2.80 s after the
ball is released from his hands. What is the speed of the
ball, assuming the speed of sound is 340 m/s?
nld *16. (III) An automobile traveling 95 km/h overtakes a 1.30-km-
long train traveling in the same direction on a track parallel g/
to the road. If the train's speed is 75 km/h, how long does
it take the car to pass it, and how far will the car have
traveled in this time? See Fig. 2-36. What are the results
if the car and train are traveling in opposite directions?
nds
ves
the
ate
at
ow
ow
pur
-1.30 km
ght
otly
age
ing
v = 75 km/h
= 95 km/h
D-m
age
FIGURE 2-36 Problem 16.
2-4 Acceleration
the
17. (I) A sports car accelerates from rest to 95 km/h in 4.3 s.
What is its average acceleration in m/s2?
18. (I) A sprinter accelerates from rest to 9.00 m/s in 1.38 s.
What is her acceleration in (a) m/s²; (b) km/h²?
rav-
the
of a
a is
and
19. (II) A sports car moving at constant velocity travels 120 m
in 5.0 s. If it then brakes and comes to a stop in 4.0 s, what
is the magnitude of its acceleration (assumed constant) in
m/s, and in g's (g = 9.80 m/s²)?
Problems 43
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