Chapter 2:
MOTION ALONG A STRAIGHT LINE
1.
A particle moves along the
x
axis from
x
i
to
x
f
. Of the following values of the initial and
fi
nal
coordinates, which results in the displacement with the largest magnitude?
A.
x
i
= 4 m,
x
f
= 6 m
B.
x
i
=
−
4 m,
x
f
=
−
8 m
C.
x
i
=
−
4 m,
x
f
= 2 m
D.
x
i
= 4 m,
x
f
=
−
2 m
E.
x
i
=
−
4 m,
x
f
= 4 m
ans: E
2.
A particle moves along the
x
axis from
x
i
to
x
f
. Of the following values of the initial and
fi
nal
coordinates, which results in a negative displacement?
3.
The average speed of a moving object during a given interval of time is always:
4.
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 mph. In how many hours will they
meet?
5.
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 80km trip is:
A.
40 km
/
h
B.
45 km
/
h
C.
48 km
/
h
D.
53 km
/
h
E.
80 km
/
h
ans: D
Chapter 2:
MOTION ALONG A STRAIGHT LINE
7
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6.
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:
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 average speed of the car for
this round trip is:
8.
The coordinate of a particle in meters is given by
x
(
t
) = 16
t
−
3
.
0
t
3
, where the time
t
is in
seconds. The particle is momentarily at rest at
t
=
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 Spring '08
 ERSKINE/TSOI
 Acceleration, Velocity, racing car, Stockholm Metro

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