College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
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Question
Chapter 2, Problem 65PE
To determine
(a)
The average velocity for the first 4 s.
To determine
(b)
The instantaneous velocity at
To determine
(c)
The average acceleration between 0 and 4 s.
To determine
(d)
The time taken for the race.
Expert Solution & Answer
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Check out a sample textbook solutionStudents have asked these similar questions
A motor car is moving with initial velocity in the x-direction at 30 m/s. After 30 s, the car applies its brakes steadily to slow down the car to a velocity of 10 m/s in 12 s. The continues onward for 10 s more. How far in m did the car travel for the full 52 s? Report your answer to three sig figs, you don't need to write "m".
HINT: Break up the problem into three stages - 30s, 12s, and the final 10s. During the 12 s, you'll need the acceleration.
Problem 2.02. At the end of a race, a runner decelerates from a velocity of 9.00 m/s at
a rate of 2.00 m/s². (a) How far does she travel in the next 5.00 s? (b) What is her final
velocity? (c) Evaluate the result. Does it make sense?
acceleration
++++
time
(a)
(b)
(c)
Fig. 3.10 Graphs describing a body moving with constant positive acceleration: (a) acceleration
versus time, (b) velocity versus time, and (c) position versus time
speed (m/s)
What Have I Learned So Far?
Consider the given graph of speed versus time shown here. Then find the values of
the following:
1
1. The acceleration from 0 s to 2 s
2.
The acceleration from 2 s to 3 s
3.
The acceleration from 5 s to 7 s
4.
The distance traveled by the body from the 2nd to the 3rd second
5. The distance traveled by the body from the 5th to the 7th second
2
0
-1
veloci
-2
momen
time
1 2 3
posi
bado 30.20
onit
4
time, (s)
5
time
6
Or
[16]
Menin
qui
grovdi
7 Moleto
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Mied (20
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The Physics of Point Particles
Chapter 2 Solutions
College Physics
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