Multiple Choice
Identify the
choice that best completes the statement or answers the question.
|
|
|
1.
|
Of the following, the greatest gravitational force would occur between
a. | a marble and a baseball 5 meters apart. | b. | a loaded freighter
on the high seas and Earth. | c. | the moon and an astronaut standing on the
moon. | d. | the moon and Earth. |
|
|
|
2.
|
The law that states that every object maintains constant velocity unless acted
on by an unbalanced force is
a. | Newton’s first law of motion. | b. | Newton’s second law of
motion. | c. | Newton’s third law of motion. | d. | the law of conservation of
momentum. |
|
|
|
3.
|
The law that states that for every action force there is an equal and opposite
reaction force is
a. | Newton’s first law of motion. | b. | Newton’s second law of
motion. | c. | Newton’s third law of motion. | d. | the law of conservation of
momentum. |
|
|
|
4.
|
The law that states that the unbalanced force acting on an object equals the
object’s mass times its acceleration is
a. | Newton’s first law of motion. | b. | Newton’s second law of
motion. | c. | Newton’s third law of motion. | d. | the law of conservation of
momentum. |
|
|
|
5.
|
Which of the following equations is correct?
a. | w = mg | c. | w = g/m | b. | w = m/g | d. | w = g + m |
|
|
|
6.
|
What is the approximate terminal velocity of a sky diver before the parachute
opens?
a. | 32 mi/h | c. | 320 mi/h | b. | 32 km/h | d. | 320 km/h |
|
|
|
7.
|
Earth pulls on the moon and holds the moon in its orbit. The moon pulls on Earth
with an equal and opposite force. This is an example of
a. | Newton’s first law. | c. | Newton’s third
law. | b. | Newton’s second law. | d. | None of the above |
|
|
|
8.
|
What is the unbalanced force that slows down a ball rolling across the
floor?
a. | the force of friction | c. | the force of inertia | b. | the force of gravity | d. | the force of
momentum |
|
|
|
9.
|
If two objects with different masses and traveling with different velocities
collide, what law allows you to predict the motion of the objects after the collision?
a. | the law of conservation of momentum | b. | the law of universal
gravitation | c. | Newton’s third law | d. | Newton’s second
law |
|
|
|
10.
|
Express the following as an equation: One newton is the force that can give an
object with a mass of 1 kg an acceleration of 1 m/s2.
a. | 1 N = 1 kg ÷ 1 m/s2 | c. | 1 N = 1 m/s2 ÷ 1
kg | b. | 1 N ´ 1 kg = 1 m/s2 | d. | 1 N = 1 kg ´ 1
m/s2 |
|
|
|
11.
|
When gravitational forces and air resistance equalize on an object that is
falling toward Earth and the object stops accelerating, what is the velocity of an object
called?
a. | resultant velocity | c. | instantaneous velocity | b. | terminal
velocity | d. | average
velocity |
|
|
|
12.
|
In the absence of air resistance, how would the acceleration of a 1.5 kg book
and the acceleration of a 15 kg rock differ if the objects were dropped from the same height?
a. | The book would accelerate twice as fast as the rock. | b. | The rock would
accelerate twice as fast as the book. | c. | The book would accelerate ten times as fast as
the rock. | d. | They would not differ; they would be the same. |
|
|
|
13.
|
What happens immediately after a sky diver opens her parachute?
a. | Air resistance greatly increases. | b. | The sky diver is in free
fall. | c. | The sky diver’s speed greatly increases. | d. | The force of gravity
greatly increases. |
|
|
|
14.
|
Which statement illustrates Newton’s first law?
a. | A stone will not move unless something pushes or pulls it. | b. | A ball rolling
across the floor eventually slows down. | c. | As a car comes to a stop, the passengers
continue to move forward. | d. | All of the
above |
|
|
|
15.
|
Which object has the greatest inertia?
a. | a tennis ball | c. | a beach ball | b. | a bowling ball | d. | a volleyball |
|
|
|
16.
|
What force causes a skater sliding on the ice to gradually slow down?
a. | a balanced force | c. | friction | b. | inertia | d. | acceleration |
|
|
|
17.
|
A seat belt helps you when your car stops suddenly by providing a(n)
a. | balanced forward force. | c. | balanced backward
force. | b. | unbalanced forward force. | d. | unbalanced backward force. |
|
|
|
18.
|
One newton is the force that can give a mass of 1 kg an acceleration of
a. | 1 m/s. | c. | 1 m/s2. | b. | 9.8 m/s. | d. | 9.8
m/s2. |
|
|
|
19.
|
Which of the following will result in the greatest acceleration?
a. | 56 N acting on a 1-kg box | c. | 23 N acting on a 2-kg
box | b. | 56 N acting on a 2-kg box | d. | 23 N acting on a 5-kg box |
|
|
|
20.
|
What unbalanced force is needed to give a 976 kg vehicle an acceleration of 2.50
m/s2?
a. | 3.90 ´ 102 N | c. | 2.44 ´ 103 N | b. | 3.90 ´
102 lb | d. | 2.44
´ 103 lb |
|
|
|
21.
|
If an equal force is applied to two cars of equal mass, Car A and Car B, Car A
will have _____ acceleration as (than) Car B.
a. | the same | c. | less | b. | greater | d. | the opposite |
|
|
|
22.
|
The gravitational force between two objects depends on masses of objects
and
a. | accelerations of objects. | c. | speeds of
objects. | b. | distance between objects. | d. | sizes of objects. |
|
|
|
23.
|
Which of the following objects exerts a gravitational force?
a. | a bowling ball | c. | a feather | b. | a book | d. | All of the
above |
|
|
|
24.
|
Increasing which of these conditions results in more gravitational force between
two objects?
a. | distance | c. | mass | b. | acceleration | d. | surface area |
|
|
|
25.
|
When an object is in free fall, the only force acting on it is
a. | gravity. | c. | inertia. | b. | friction. | d. | terminal
velocity. |
|
|
|
26.
|
Free-fall acceleration near Earth’s surface
a. | depends on an object’s weight. | c. | depends on an object’s
mass. | b. | is the same for all objects. | d. | None of the
above |
|
|
|
27.
|
How much does a 59.0 kg woman weigh on Earth?
a. | 6.02 N | c. | 145 lb | b. | 59.0 lb | d. | 578 N |
|
|
|
28.
|
Orbital motion is a combination of
a. | mass and friction. | c. | acceleration and gravity. | b. | forward motion and
free fall. | d. | weight and
vertical velocity. |
|
|
|
29.
|
Astronauts “float” when inside an orbiting spaceship because they
are
a. | weightless. | c. | in free fall. | b. | in a vacuum. | d. | outside Earth’s
gravity. |
|
|
|
30.
|
Which is an example of projectile motion?
a. | a rolling bowling ball | c. | a balloon rising in the air | b. | a dart thrown at a
dart board | d. | a high-speed
train accelerating |
|
|
|
31.
|
Whenever a force is exerted, another force occurs that is _____ in size, and
_____ in direction.
a. | equal, same | c. | equal, opposite | b. | smaller, same | d. | smaller,
opposite |
|
|
|
32.
|
The force exerted on the racket by a hit tennis ball is the
a. | gravitational force. | c. | acceleration. | b. | reaction force. | d. | action force. |
|
|
|
33.
|
Which statement about action-reaction force pairs is incorrect?
a. | They act on the same object. | c. | They occur at the same
time. | b. | They always occur in pairs. | d. | They are equal and opposite. |
|
|
|
34.
|
An object’s momentum is determined by the object’s
a. | weight and velocity. | c. | mass and velocity. | b. | mass and acceleration. | d. | weight and
acceleration. |
|
|
|
35.
|
Two identical cars are traveling at equal speeds. One is going north and the
other south. If they collide head-on and stick together, what will happen to the motion of the
cars?
a. | Both cars will move north. | c. | Both cars will move
south. | b. | Both cars will move east. | d. | Both cars will stop. |
|
|
|
36.
|
What is the momentum of a 255 g apple falling at 16.0 m/s?
a. | 4.08 m/s2 downward | c. | 15.9 m/s2
downward | b. | 4.08 kg • m/s downward | d. | 15.9 kg • m/s downward
|
|
|
|
37.
|
Which of the following has a momentum of zero?
a. | a newspaper lying on a table | c. | a leaf falling to the
ground | b. | a plane flying through the air | d. | All of the
above |
|
|
|
38.
|
When a moving bowling ball hits a pin, some of the ball’s momentum
a. | doubles in force. | c. | is transferred to the pin. | b. | increases the
pin’s mass. | d. | is
lost. |
|
|
|
39.
|
How does the total momentum of two objects before a collision compare with the
total momentum after the collision?
a. | It is the same. | c. | It is equal to zero | b. | It is less. | d. | It is greater. |
|
|
|
40.
|
A 10.0 kg dog chasing a rabbit north at 6.0 m/s has a momentum of
a. | 0.6 kg m/s. | c. | 60.0 m/s. | b. | 60.0 kg m/s north. | d. | 60.0 kg/s. |
|
|
|
41.
|
When the velocity of an object changes, it is
acted upon by a(n) a. | force. | c. | momentum. | b. | inertia. | d. | deceleration. |
|
|
|
42.
|
If the net force on an object is zero, then the object has
a. | reaction forces. | c. | balanced forces. | b. | action forces. | d. | unbalanced
forces. |
|
|
|
43.
|
When objects are moved further apart from each other, the force of gravity
between them
a. | increases. | c. | decreases. | b. | stays the same. | d. | decreases at first then
increases. |
|
|
|
44.
|
The SI unit of force, named after the scientist who described the relationship
between motion and force, is called the
a. | newton. | c. | curie. | b. | einstein. | d. | pasteur |
|
|
|
45.
|
When air resistance balances the weight of a falling object, the velocity
a. | slowly decreases. | c. | rapidly increases. | b. | remains constant. | d. | None of the
above |
|
|
|
46.
|
The weight of an object can be calculated by multiplying mass by
a. | distance. | c. | velocity. | b. | speed. | d. | free-fall
acceleration. |
|
|
|
47.
|
Which object does not have momentum?
a. | a fish swimming in a pond | c. | a rock by the side of the
road | b. | a feather falling to the ground | d. | a boulder rolling down a
hill |
|
|
|
48.
|
What is the reaction force when you place a cup on a table?
a. | the force of the cup on the table | c. | the force of gravity on the
table | b. | the force of the table on the cup | d. | the force of gravity on the
cup |
|
|
|
49.
|
Which of the following is not a factor in calculating momentum?
a. | mass | c. | acceleration | b. | direction | d. | speed |
|
|
|
50.
|
Whenever an object is standing still, which value is always zero?
a. | speed | c. | momentum | b. | velocity | d. | All of the
above |
|
|
|
51.
|
A tug-of-war that results in one team pulling the other across the line is an
example of
a. | action forces. | c. | balanced forces. | b. | reaction forces. | d. | unbalanced
forces. |
|
|
|
52.
|
A force is continuously applied to an object, causing it to accelerate. After a
period of time, however, the object stops accelerating. What conclusions can be drawn?
a. | The mass of the object has increased. | b. | Gravity on the object has
increased. | c. | The object is experiencing some kind of friction. | d. | The momentum of the
object has reached a maximum. |
|
|
|
53.
|
Weight is best described as
a. | an object’s resistance to acceleration. | b. | what causes an
object to fall. | c. | the downward force exerted on an object due to gravity. | d. | a force solely
dependent on an object’s mass. |
|
|
|
54.
|
Which of the following units is used to measure acceleration?
|
|
|
55.
|
Which of the following is true?
a. | Weight and mass are proportional but not equal. | b. | Weight is
gravitational force an object experiences due to its mass. | c. | The weight of an
object on Earth is greater than the weight of the same object on the moon, but the object’s
mass stays the same. | d. | All of the
above |
|
|
|
56.
|
The tendency of an object at rest to remain at rest is
a. | inertia. | c. | free fall. | b. | momentum. | d. | acceleration. |
|
|
|
57.
|
Near Earth’s surface, the strongest gravitational force would occur
between an elephant and
a. | the sun. | c. | a cat. | b. | the moon. | d. | Earth. |
|
|
|
58.
|
Near Earth’s surface, an object’s free-fall acceleration increases
as its
a. | mass increases. | c. | speed increases. | b. | weight increases. | d. | None of the
above |
|