Physics for Scientists and Engineers, 4e (Giancoli)
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Course
MATH 0104
Institution
Mclennan Community College
Physics for Scientists and Engineers, 4e (Giancoli)
Chapter 2
Describing Motion: Kinematics in One Dimension
2.1
Conceptual Questions
1)
Car A is traveling at twice the speed of car B. They both hit the brakes at the same time and undergo identical decelerations. How does the time re...
Physics for Scientists and Engineers, 4e (Giancoli)
Chapter
2
Describing Motion: Kinematics in One Dimension
2.1
Conceptual Questions
1)
Car A is traveling at twice the speed of car B. They both hit the brakes at the same time and undergo
identical decelerations. How does the time required for car A to stop compare with that for car B?
Answer
:
Car A takes twice as long to stop.
Diff: 1
Page Ref: Sec. 2-
5
2)
Car A is traveling at twice the speed of car B. They both hit the brakes at the same time and undergo
identical decelerations. How does the distance required for car A to stop compare with that for car B?
Answer
:
It takes four times the distance to stop.
Diff: 1
Page Ref: Sec. 2-
5
3)
It is possible to have a zero acceleration, and still be moving.
Answer
:
TRUE
Diff: 1
Page Ref: Sec. 2-4
4)
When the velocity and acceleration of an object have the same sign, the speed of the object increases.
Answer
:
,TRUE
Diff: 1
Page Ref: Sec. 2-4
, 5)
When the velocity and acceleration of an object have opposite signs, the speed of the object increases.
Answer
:
FALSE
Diff: 1
Page Ref: Sec. 2-4
6)
The average velocity of a car traveling with a constant acceleration during a certain time interval is equal
to the mean of the velocities at the beginning and end of that time interval.
Answer
:
TRUE
Diff: 1
Page Ref: Sec. 2-5
7)
Suppose that an object travels from one point in space to another. Make a comparison between the
displacement and the distance traveled.
A)
The displacement is either greater than or equal to the distance traveled.
B)
The displacement is always equal to the distance traveled.
C)
The displacement is either less than or equal to the distance traveled.
D)
The displacement can be either greater than, smaller than, or equal to the distance traveled.
E)
If the displacement is equal to zero, then the distance traveled will also equal zero.
Answer
:
C
Diff: 1
Page Ref: Sec. 2-1
, 8)
Which statement below about the distance between the starting and ending positions and the
displacement between the starting and ending positions is correct?
A)
The distance between the starting and ending positions is twice the magnitude of the displacement
between the starting and ending positions.
B)
The distance between the starting and ending positions is equal to the magnitude of the displacement
between the starting and ending positions.
C)
The distance between the starting and ending positions is the negative of the magnitude of the
displacement between the starting and ending positions.
D)
The distance between the starting and ending positions is greater than the magnitude of the
displacement between the starting and ending positions.
E)
The distance between the starting and ending positions is less than the magnitude of the displacement
between the starting and ending positions.
Answer
:
B
Diff: 1
Page Ref: Sec. 2-1
9)
Which statement is correct about the relationship between the average speed and the magnitude of the
average velocity for any motion?
A)
The average speed is always one-half the magnitude of the average velocity.
B)
The average speed is always greater than or equal to the magnitude of the average velocity.
C)
The average speed can be less than, greater than or equal to the magnitude of the average velocity.
D)
The average speed is always less than or equal to the magnitude of the average velocity.
E)
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