Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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Which
of the following choices best represents force? a. | a push or a pull always causing
motion | b. | a push or a pull always causing
acceleration | c. | a push or a pull acting without an
object | d. | a push or a pull acting on an object | | |
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2.
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Which
of the following best determines the net force when more than one force is acting on an
object? a. | a combination of
all motions of an object | b. | a combination of all motions of an object in two
directions | c. | a combination of all forces acting on an
object | d. | a combination of forces acting on an object in two
directions | | |
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3.
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When
the net forces equal 0 N, they are which of the following? a. | balanced | c. | a
push | b. | unbalanced | d. | a
pull | | | | |
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4.
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Which
of the following always causes change in speed, direction, or both? a. | balanced
forces | c. | either balanced
or unbalanced forces | b. | unbalanced forces | d. | any combination of forces | | | | |
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5.
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Which
of the following causes an object to start moving? a. | balanced
forces | c. | either balanced
or unbalanced forces | b. | unbalanced forces | d. | any combination of forces | | | | |
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6.
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What
is a force that opposes motion between two surfaces that are in contact? a. | friction | c. | velocity | b. | motion | d. | acceleration | | | | |
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7.
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Which
are the two factors that determine the amount of friction? a. | the force and
the roughness of the surfaces | b. | hills and valleys and the roughness of the
surfaces | c. | the force and how much surfaces come in
contact | d. | the force and the weight exerted on the
surfaces | | |
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8.
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Which
of these is opposed by static friction? a. | a pencil rolling on a table | c. | a chair sliding on a floor | b. | a dog running in
a yard | d. | a worker pushing
on a non-moving box | | | | |
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9.
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In
which of the following activities is friction helpful? a. | engine parts
wearing out | c. | soil
erosion | b. | car tires moving a car forward | d. | holes developing in your socks | | | | |
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10.
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In
which of the following activities is friction harmful? a. | brakes stopping
a car | c. | an eraser
erasing | b. | a person walking | d. | car engine parts wearing out | | | | |
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11.
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The
force of gravity a. | is not related
to the mass of the objects. | b. | is only related to the mass of large
objects. | c. | is related to the weight of the
objects. | d. | is related to the mass of the
objects. | | |
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12.
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As
the distance between two objects increases, the force of gravity between them a. | decreases. | c. | increases only
slightly. | b. | does not change. | d. | increases greatly. | | | | |
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13.
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Which
of the following does NOT describe weight? a. | changes as gravitational force
changes | c. | is a measure of
gravitational force | b. | is constant | d. | can be measured in newtons | | | | |
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14.
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The
gravitational pull is greater between two objects that a. | have greater
masses. | c. | are farther
apart. | b. | have rougher surfaces. | d. | are moving at greater speed. | | | | |
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15.
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What
is the net force on an object when you combine a force of 10 N north with a force of 5 N
south? a. | 5 N
south | c. | 50 N
north | b. | 15 N north | d. | 5 N north | | | | |
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16.
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Mass
is a. | different on the
moon than on Earth. | c. | a measure of the
amount of matter. | b. | a measure of gravitational
force. | d. | measured in
newtons. | | | | |
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17.
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When
a mover puts furniture on wheels, which type of friction is the mover using to make the job
easier? a. | static
friction | c. | rolling kinetic
friction | b. | sliding kinetic friction | d. | gravitational friction | | | | |
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18.
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If a
student has a weight of 420 N on Earth, what is the student’s weight on the moon? (Moon’s
gravity = 1/6 of Earth’s gravity) a. | 70 N | c. | 70 kg | b. | 2520
N | d. | 2520
kg | | | | |
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Use the figures below to answer the following
questions.
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19.
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Look
at Figure A. Why does the block not move? a. | no force applied | c. | surface friction | b. | frictional
force | d. | kinetic
friction | | | | |
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20.
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Look
at Figure B. What force keeps the block in place? a. | gravitational force | c. | no force applied | b. | a magnetic
force | d. | static
friction | | | | |
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21.
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Look
at Figure C. The block is moving. What force acts against the movement of the block? a. | static
friction | c. | a magnetic
force | b. | kinetic friction | d. | gravitational force | | | | |
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22.
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If a
baseball and a cannonball are dropped from the same height at the same time, and there is no air
resistance, which ball will hit the ground first? a. | The cannonball lands first. | b. | The baseball
lands first. | c. | The balls land at the same time. | d. | The ball with
the larger volume lands first. | | |
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23.
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What
feature of an object does NOT affect air resistance? a. | its
size | c. | its
shape | b. | its chemical properties | d. | its speed | | | | |
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24.
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Why
do astronauts in space appear weightless? a. | There is no gravity in space. | c. | They have no mass in space. | b. | Air resistance
opposes gravity. | d. | They are in free
fall. | | | | |
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25.
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In
what directions is a projectile accelerated? a. | both vertically and
horizontally | c. | vertically
upward | b. | vertically downward | d. | horizontally forward | | | | |
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26.
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The
reaction force of a chair you are sitting on a. | is greater than your weight. | c. | is determined by many factors. | b. | is equal to your
weight. | d. | varies. | | | | |
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27.
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Which
of the following is the equation for Newton’s second law of motion? a. | F =
m x a | c. | a =
m x F | b. | m = F x a | d. | F = m ÷ a | | | | |
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28.
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When
a train increases its velocity, its momentum a. | decreases. | c. | increases. | b. | remains
unchanged. | d. | is transferred
to it surroundings. | | | | |
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29.
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A car
with a mass of 1400 kg moves along the ice with a constant velocity of 18.0 m/s. What is the
car’s momentum? a. | 77.8 N | c. | 77.8 kg•m/s | b. | 25,200
N | d. | 25,200
kg•m/s | | | | |
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30.
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When
a bowling ball collides with a bowling pin, a. | the momentum of both the pin and the ball
increases. | b. | the momentum transfers from the ball to the
pin. | c. | the momentum of
both the pin and the ball decreases. | d. | the momentum of the pin and the ball does not
change. | | |
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31.
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The
law of conservation of momentum states that when two objects collide, their combined
momentum a. | increases after
the collision. | b. | remains the same after the collision. | c. | decreases after
the collision. | d. | cannot be determined after the
collision. | | |
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32.
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If an
action force is a cue ball hitting a billiard ball, then the reaction force is a. | exerted on the
table. | b. | exerted on all the other billiard
balls. | c. | not present. | d. | exerted by the
billiard ball on the cue ball. | | |
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33.
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A
crumpled piece of paper hits the ground before a flat sheet of paper because a. | the acceleration
of gravity is greater on the crumpled paper. | b. | there is more
air resistance against the flat paper. | c. | the crumpled paper is more massive. | d. | the crumpled
paper is less massive. | | |
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34.
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An
ice skater with a mass of 65 kg moves along the ice with a constant velocity of 2.0 m/s. What is the
skater’s momentum? a. | 130 kg•m/s | c. | 130 N | b. | 32
kg•m/s | d. | 32
N | | | | |
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35.
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Why
does a ball thrown horizontally follow a path that is curved downward? a. | There is no
acceleration on the ball. | b. | The ball is accelerated in the horizontal direction
only. | c. | The ball is accelerated by gravity in the vertical direction
only. | d. | The ball is accelerated in both the vertical and horizontal
directions. | | |
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Completion
Complete each sentence or
statement.
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Use the terms from the following list to complete the sentences
below.
motion | velocity | force | gravity | weight | speed | acceleration | friction | mass | | | |
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36.
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The
newton is the SI unit of ____________________.
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37.
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A
force that always acts to oppose motion is ____________________.
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38.
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An
object’s ____________________ can change with its location.
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Use the terms from the following list to complete the sentences
below.
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39.
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The
force that pulls everything toward Earth’s center is Earth’s
____________________.
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40.
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When
a push or a pull is acting on any object, a(n) ____________________ is being exerted on that
object.
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41.
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Forces on an object are combined to determine the ____________________ on that
object.
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Use the terms from the following list to complete the sentences
below.
momentum | inertia | free
fall | projectile motion | terminal velocity | air
resistance | mass | acceleration | centripetal force | | | |
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42.
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When
air resistance exactly matches the downward force of gravity, a falling object stops accelerating and
reaches _____________________.
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43.
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Only
in a vacuum or in space can an object be in _____________________.
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44.
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A car
accelerating from 60 km/h to a constant speed of 80 km/h has increased its
_____________________.
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45.
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The
horizontal movement given to an arrow by a bow is one component of
_____________________.
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Matching
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Match each item with the correct statement below. a. | Newton’s
first law of motion | c. | Newton’s
third law of motion | b. | Newton’s second law of
motion | d. | inertia | | | | |
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46.
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The
tendency of all objects is to resist any change in motion.
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47.
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An
object at rest remains at rest, and an object in motion remains in motion at constant speed and in a
straight line unless acted on by an unbalanced force.
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48.
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All
forces act in pairs.
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49.
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The
acceleration of an object depends on its mass and the amount of force applied.
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Use the figure below to answer the following
questions.
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50.
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the
path of the orbiting spacecraft
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51.
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the
path of free fall for the spacecraft
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52.
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the
path the spacecraft would follow if there were no gravity
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53.
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curve
of Earth’s surface
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