77 and 78 napter 3 reviewQuantitative problemsSection 3.277. What is the average velocity of a man who runs forwardat 8 m/s for 9 s and back again at 5 m/s for 3 s after an 8 sbreak?78. Two cyclists that are 500 m apart start biking towardeach other. They bike at speeds of 6 and 4 m/s.a. How long does it take for them to reach each other?b. How far does the slower biker travel?40Velocity vs. time2086.-20-40234Time (s)79. The velocity versus time graph above represents themotion of a ball that is thrown upward. Use the graph tocalculate the maximum height the ball reaches.80. CA runner passes the 2,000 m mark of a race 380s afterstarting. At what time (after starting) will the runner reachthe 5,000 m mark if her speed remains constant?87. (OCTVelocity (m/s)

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College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter1: Introduction: The Nature Of Science And Physics

Section: Chapter Questions

Problem 1PE: The speed limit on some interstate highways is roughly 100 km/h. (a) What is this in meters per...

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Question

77 and 78

napter 3 review
Quantitative problems
Section 3.2
77. What is the average velocity of a man who runs forward
at 8 m/s for 9 s and back again at 5 m/s for 3 s after an 8 s
break?
78. Two cyclists that are 500 m apart start biking toward
each other. They bike at speeds of 6 and 4 m/s.
a. How long does it take for them to reach each other?
b. How far does the slower biker travel?
40
Velocity vs. time
20
86.
-20
-40
2
3
4
Time (s)
79. The velocity versus time graph above represents the
motion of a ball that is thrown upward. Use the graph to
calculate the maximum height the ball reaches.
80. CA runner passes the 2,000 m mark of a race 380s after
starting. At what time (after starting) will the runner reach
the 5,000 m mark if her speed remains constant?
87. (
OCT
Velocity (m/s)

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