Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Which of the following is a physical quantity that has both magnitude and
direction?
a. | vector | c. | resultant | b. | scalar | d. | frame of
reference |
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2.
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The written abbreviation,  , represents a quantity that has which of the
following abbreviations in the text?
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3.
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In the figure above, which diagram represents the vector addition C =
A + B?
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4.
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In the figure above, which diagram represents the vector subtraction C =
A–B?
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5.
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Multiplying or dividing vectors by scalars results in
a. | vectors. | b. | scalars. | c. | vectors if
multiplied or scalars if divided. | d. | scalars if multiplied or vectors if
divided. |
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6.
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A car travels down a road at a certain velocity, vcar. The
driver slows down so that the car is traveling only half as fast as before. Which of the following is
the correct expression for the resulting velocity?
a. | 2vcar | c. | – vcar | b. |  vcar | d. | –2vcar |
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7.
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A football player runs in one direction to catch a pass, then turns and runs
twice as fast in the opposite direction toward the goal line. Which of the following is a correct
expression for the original velocity and the resulting velocity?
a. | –vplayer, –2vplayer | c. | vplayer, –2vplayer | b. | vplayer, 2vplayer | d. | 2vplayer,
–vplayer |
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8.
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A student walks from the door of the house to the end of the driveway and
realizes that he missed the bus. The student runs back to the house, traveling three times as fast.
Which of the following is the correct expression for the return velocity if the initial velocity is
vstudent?
a. | 3vstudent | c. |  vstudent | b. |  vstudent | d. | –3vstudent |
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9.
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An ant on a picnic table travels 3.0 ´ 10  cm
eastward, then 25 cm northward, and finally 15 cm westward. What is the magnitude of the ant’s
displacement relative to its original position? a. | 70 cm | c. | 52 cm | b. | 57 cm | d. | 29 cm |
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10.
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In a coordinate system, a vector is oriented at angle q
with respect to the x-axis. The x component of the vector equals the
vector’s magnitude multiplied by which trigonometric function?
a. | cos q | c. | sin q | b. | cot q | d. | tan q |
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11.
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In a coordinate system, a vector is oriented at angle q
with respect to the x-axis. The y component of the vector equals the
vector’s magnitude multiplied by which trigonometric function?
a. | cos q | c. | sin q | b. | cot q | d. | tan q |
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12.
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How many displacement vectors shown in the figure above have components that lie
along the y-axis and are pointed in the –y direction?
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13.
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Find the resultant of these two vectors: 2.00 ´
10 
units due east and 4.00 ´ 10  units 30.0 °
north of west. a. | 300 units, 29.8° north of west | c. | 546 units,
59.3° north of west | b. | 581 units, 20.1° north of east | d. | 248 units, 53.9° north of
west |
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14.
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Which of the following is the motion of objects moving in two dimensions under
the influence of gravity?
a. | horizontal velocity | c. | vertical velocity | b. | directrix | d. | projectile
motion |
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15.
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Which of the following is not an example of projectile motion?
a. | a volleyball served over a net | c. | a hot-air balloon drifting toward
Earth | b. | a baseball hit by a bat | d. | a long jumper in action |
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16.
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Which of the following does not exhibit parabolic motion?
a. | a frog jumping from land into water | b. | a basketball thrown to a
hoop | c. | a flat piece of paper released from a window | d. | a baseball thrown to
home plate |
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 The figure above shows the path of a ball tossed from a
building. Air resistance is ignored.
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17.
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At what point of the ball’s path shown in the figure above is the vertical
component of the ball’s velocity zero?
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18.
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In the figure above, the magnitude of the ball’s velocity is least at
location
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19.
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Which of the following is a coordinate system for specifying the precise
location of objects in space?
a. | x-axis | c. | frame of reference | b. | y-axis | d. | diagram |
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20.
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A jet moving at 500.0 km/h due east is in a region where the wind is moving at
120.0 km/h in a direction 30.00° north of east. What is the speed of
the aircraft relative to the ground?
a. | 620.2 km/h | c. | 588.7 km/h | b. | 606.9 km/h | d. | 511.3 km/h |
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