ECE 6E44 TEST BANK REVISION PACK.3. The position y of a particle moving along the y axis depends on the time t according to the
equation
y = at – bt2
. The dimensions of the quantities a and b are respectively:
A) L2
/T, L3
/T2
B) L/T2
, L2
/T
C) L/T, L/T2
D) L3
/T, T2
/L
E) none of...
,Import Settings:
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Information Field: Difficulty
Information Field: Section
Highest Answer Letter: E
Multiple Keywords in Same Paragraph: No
Chapter: Chapter 2
Multiple Choice
1. A particle moves along the x axis from xi to x f . Of the following values of the initial and final
coordinates, which results in the displacement with the largest magnitude?
A) xi = 4m, x f = 6m
B) xi = –4m, x f = –8m
C) xi = –4m, x f = 2m
D) xi = 4m, x f = –2m
E) xi = –4m, x f = 4m
Ans: E
Difficulty: E
Section: 2-3
2. A particle moves along the x axis from xi to x f . Of the following values of the initial and final
coordiantes, which results in a negative displacement?
A) xi = 4m, x f = 6m
B) xi = –4m, x f = –8m
C) xi = –4m, x f = 2m
D) xi = –4m, x f = –2m
E) xi = –4m, x f = 4m
Ans: B
Difficulty: E
, Full file at http://testbankscafe.eu/Test-Bank-for-Fundamentals-of-Physics-Extended-9th-Edition-Halliday
Section: 2-3
3. The position y of a particle moving along the y axis depends on the time t according to the
equation
y = at – bt2. The dimensions of the quantities a and b are respectively:
A) L2/T, L3/T2
B) L/T2, L2/T
C) L/T, L/T2
D) L3/T, T2/L
E) none of these
Ans: C
Difficulty: E
Section: 2-3
4. The average speed of a moving object during a given interval of time is always:
A) the magnitude of its average velocity over the interval
B) the distance covered during the time interval divided by the time interval
C) one-half its speed at the end of the interval
D) its acceleration multiplied by the time interval
E) one-half its acceleration multiplied by the time interval.
Ans: B
Difficulty: E
Section: 2-4
5. Two automobiles are 150 kilometers apart and traveling toward each other. One automobile is
moving at 60 km/h and the other is moving at 40 km/h. In how many hours will they meet?
A) 2.5
B) 2.0
C) 1.75
D) 1.5
E) 1.25
Ans: D
Difficulty: E
, Full file at http://testbankscafe.eu/Test-Bank-for-Fundamentals-of-Physics-Extended-9th-Edition-Halliday
Section: 2-4
6. A car travels 40 kilometers at an average speed of 80 km/h and then travels 40 kilometers at
an average speed of 40 km/h. The average speed of the car for this 80 km trip is:
A) 40 km/h
B) 45 km/h
C) 48 km/h
D) 53 km/h
E) 80 km/h
Ans: D
Difficulty: M
Section: 2-4
7. A car starts from Hither, goes 50 km in a straight line to Yon, immediately turns around, and
returns to Hither. The time for this round trip is 2 hours. The magnitude of the average velocity
of the car for this round trip is:
A) 0
B) 50 km/hr
C) 100 km/hr
D) 200 km/hr
E) cannot be calculated without knowing the acceleration
Ans: A
Difficulty: E
Section: 2-4
8. A car starts from Hither, goes 50 km in a straight line to Yon, immediately turns around, and
returns to Hither. The time for this round trip is 2 hours. The average speed of the car for this
round trip is:
A) 0
B) 50 km/h
C) 100 km/h
D) 200 km/h
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