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Physics 1A (b) Fall 2006: Quiz 1
Version D
1
09.29.06
Closed book. No work needs to be shown for multiple-choice questions.
1
. The value of an object’s acceleration may be characterized in equivalent words by which of
the following?
a. velocity
b. rate of change of velocity
c. displacement
d. rate of change of displacement
2
. Suppose an equation relating position,
x
, to time,
t
, is given by
x = b t
3
+ c t
4
, where
b
and
c
are constants. The dimensions of
b
and
c
are respectively:
a. T
3
, T
4
.
b. 1/T
3
, 1/T
4
.
c. L/T
3
, L/T
4
.
d. L
2
⋅
T
3
, L
2
⋅
T
4
.
3
. Changing the positive direction in a reference frame to the opposite direction does not change
the sign of which of the following quantities?
a. velocity
b. speed
c. average velocity
d. displacement
4
. A high fountain of water is in the center of a circular pool of water. You walk the
circumference of the pool and measure it to be 150 meters. You then stand at the edge of the
pool and use a protractor to gauge the angle of elevation of the top of the fountain. It is 55

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