Multiple ChoiceIdentify the choice that best completes the
statement or answers the question. All questions are worth 1 point each unless otherwise noted.
Use equation below. Do all of your work on scratch paper provided, do not write on this
test.
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1
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A ball is thrown straight up and then falls straight back down. When it attains
maximum height, the ball’s velocity is
a. | equal to its displacement. | b. | at its maximum. | c. | at its
minimum. | d. | equal to its displacement divided by the time. |
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2
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(3 points) A cannon with a barrel velocity of 120 m/s launches a cannonball
horizontally from a tower. Neglecting air resistance, how far vertically will the cannonball have
fallen after 2 seconds?
a. | 240 m | b. | 120 m | c. | 20 m
| d. | 480 m | e. | none of the
above |
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3
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A vector is a quantity that has
a. | magnitude and time. | b. | time and direction. | c. | magnitude and
direction. |
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4
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A ball thrown in the air will never go as far as physics ideally would predict
because
a. | gravity is acting. | b. | air friction slows the
ball. | c. | ideally the ball would never land. | d. | one can never throw the ball fast
enough. | e. | all of the above |
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5
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A projectile launched horizontally hits the ground in 1.5 seconds. If it had
been launched with a much higher speed in the same direction, it would have hit the ground
(neglecting Earth's curvature and air resistance) in
a. | more than 1.5 s. | b. | less than 1.5 s. | c. | 1.5
s. |
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6
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In the absence of air resistance, objects fall at constant
a. | speed. | b. | velocity. | c. | acceleration. | d. | distances each successive
second. | e. | all of the above |
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7
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(2 points) Suppose a small plane can fly at 210 km/h relative to the surrounding
air. Suppose also that there is a 20 km/h tailwind. How fast does the plane's shadow move across
the ground?
a. | 190 km/h | b. | 230 km/h | c. | 5
km/h | d. | 210 km/h | e. | 20 km/h |
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8
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(3 points) A cannon with a barrel velocity of 70 m/s launches a cannonball
horizontally from a tower. Neglecting air resistance, how far vertically will the cannonball have
fallen after 4 seconds?
a. | 80 m | b. | 70 m | c. | 1120 m
| d. | 280 m | e. | none of the
above |
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9
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(3 points) you drop a rock off of a tall building. It hits the ground
in 2.7 seconds. What what the final velocity?
a. | 26 m/s | c. | -26 m/s | b. | -2.6 m/s | d. | 2.6 m/s |
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10
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The resultant vector that would result from adding vectors A and
B would look most like which vector?
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11
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(3 Points) If the height of the ramp was 0.65m above the floor, how long
would it take for the marble to hit the ground after it left the ramp?
a. | 0.36 seconds | c. | 0.07 seconds | b. | 0.13 seconds | d. | 0.26 seconds |
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12
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(3 Points) A bike travels at a constant speed of 3.5 m/s for 20
seconds. How far did it travel?
a. | 0.7 meters | c. | 70 meters | b. | 7 meters | d. | 700 meters |
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13
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(3 points) In the absence of air resistance, the angle at which a thrown ball
will go the farthest is
a. | 45 degrees. | b. | 15 degrees. | c. | 30
degrees. | d. | 75 degrees. | e. | 60 degrees. |
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14
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(3 points) You drop a rock off of a tall building. It takes 8.5 seconds
to hit the ground. How tall is the building?
a. | 42 m | c. | 710 m | b. | 35 m | d. | 350 m |
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15
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(3 points) You drop a rock off of the top of a 45 m tall building. How
long does it take before it hits the ground?
a. | 0.30 s | c. | 30 s | b. | 2.1 s | d. | 3.0 s |
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16
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In the absence of air resistance, the angle at which a thrown ball will go the
farthest is
a. | 45 degrees. | b. | 60 degrees. | c. | 75
degrees. | d. | 15 degrees. | e. | 30 degrees. |
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17
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A ball is thrown straight upward at 5 m/s. Ideally (no air resistance), the ball
will return to the thrower's hand with a speed of
a. | 0 m/s. | b. | 5 m/s. | c. | 10 m/s.
| d. | 2.5 m/s. | e. | There is not enough information to
say. |
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18
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At the instant a ball is thrown horizontally with a large force, an identical
ball is dropped from the same height. Which ball hits the ground first?
a. | The dropped ball | b. | Neither. They both hit the ground at the same
time. | c. | The horizontally thrown ball |
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19
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The horizontal component of a projectile's velocity is independent of
a. | the vertical component of its velocity. | b. | time. | c. | the range of the
projectile. |
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20
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A scalar is a quantity that has
a. | direction. | b. | time. | c. | magnitude. | d. | color. |
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21
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If you added the vectors below, the resultant would look most like which of the
following vectors?
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22
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(3 points) You drop a rock off of the top of a 45 m tall building. How
long does it take before it hits the ground?
a. | 30 s | c. | 0.3 s | b. | 2.1 s | d. | 3.0 s |
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23
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If it takes 2 seconds for the pendulum to swing forward and backwards one time,
what is the period (T) of the pendulum?
a. | not enough information to determine | c. | 2 seconds | b. | 4
seconds | d. | 1
second |
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24
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(2 points) What is the resultant of a 12-unit vector and 16-unit vector at right
angles to each other?
a. | 20 units. | b. | 4 units. | c. | 28
units. | d. | none of the above |
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25
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The ____________ is the path of a projectile.
a. | trajectory | c. | range | b. | velocity vector | d. | independant |
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26
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In the absence of air friction, the horizontal component of a projectile's
velocity doesn't change as the projectile moves.
a. | Always true | b. | Always false | c. | Sometimes
true |
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27
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(3 points) A freely falling object starts from rest. After falling for 9
seconds, it will have a speed of about
a. | more than 450 m/s. | b. | 450 m/s. | c. | 90
m/s. | d. | 9 m/s. | e. | 45 m/s. |
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28
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In the absence of air resistance, at what other angle will a thrown ball go the
same distance as one thrown at an angle of 45 degrees?
a. | 50 degrees. | b. | 35 degrees. | c. | 45
degrees. | d. | 40 degrees. | e. | 60 degrees. |
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29
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A ball thrown in the air will never go as far as physics ideally would predict
because
a. | ideally the ball would never land. | b. | air friction slows the
ball. | c. | one can never throw the ball fast enough. | d. | gravity is
acting. | e. | all of the above |
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30
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The horizontal component of a projectile's velocity is independent of
a. | time. | b. | the vertical component of its
velocity. | c. | the range of the projectile. |
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