Multiple Choice
Identify the
choice that best completes the statement or answers the question.
|
|
|
1.
|
Which of the following statements does not describe force?
a. | Force causes objects at rest to remain stationary. | b. | Force causes objects
to start moving. | c. | Force causes objects to stop moving. | d. | Force causes objects to change
direction. |
|
|
|
2.
|
Which of the following forces arises from direct physical contact between two
objects?
a. | gravitational force | c. | contact force | b. | fundamental force | d. | field force |
|
|
|
3.
|
A free-body diagram represents all of the following except
a. | the object. | c. | forces exerted by the object. | b. | forces as
vectors. | d. | forces exerted on
the object. |
|
|
|
|
|
|
4.
|
The free-body diagram shown above represents a car being pulled by a towing
cable. In the diagram, which of the following is the gravitational force acting on the car?
a. | 5800 N | c. | 14 700 N | b. | 775 N | d. | 13 690 N |
|
|
|
|
|
|
5.
|
In the free-body diagram shown above, which of the following is the
gravitational force acting on the balloon?
a. | 1520 N | c. | 4050 N | b. | 950 N | d. | 5120 N |
|
|
|
6.
|
A single force acts on an object. The components of this force act along the
+x-axis and the –y-axis. The single force that will bring the object into
equilibrium has components that act along the
a. | +x-axis and +y-axis. | c. | -x-axis and +y-axis. | b. | +x-axis and
-y-axis. | d. | -x-axis and -y-axis. |
|
|
|
7.
|
A sculpture is suspended in equilibrium by two cables, one from a wall and the
other from the ceiling of a museum gallery. Cable 1 applies a horizontal force to the right of the
sculpture and has a tension, F . Cable 2 applies a force upward and to the left at an angle
of 37.0 ° to the negative x-axis and has a tension,
F . The gravitational force on the sculpture is 5.00 ´
10  N. What is F ? a. | 4440 N | c. | 8310 N | b. | 6640 N | d. | 3340 N |
|
|
|
8.
|
If a nonzero net force is acting on an object, then the object is
definitely
a. | at rest. | c. | being accelerated. | b. | moving with a constant
velocity. | d. | losing
mass. |
|
|
|
9.
|
In general, Fnet equals
|
|
|
10.
|
According to Newton’s second law, when the same force is applied to two
objects of different masses,
a. | the object with greater mass will experience a great acceleration, and the object
with less mass will experience an even greater acceleration. | b. | the object with
greater mass will experience a smaller acceleration, and the object with less mass will experience a
greater acceleration. | c. | the object with greater mass will experience a
greater acceleration, and the object with less mass will experience a smaller
acceleration. | d. | the object with greater mass will experience a small acceleration, and the object
with less mass will experience an even smaller acceleration. |
|
|
|
11.
|
An airplane with a mass of 1.20 ´ 10  kg tows
a glider with a mass of 0.60 ´ 10  kg. If the airplane propellers
provide a net forward thrust of 3.60 ´ 10  N, what is the acceleration of
the glider? (Disregard friction.) a. | 2.00 m/s | c. | 6.00 m/s | b. | 3.00 m/s | d. | 9.80 m/s |
|
|
|
12.
|
A sled traveling at a speed of 3.0 m/s slows to a stop 4.0 m from the point
where its passenger rolled off. What is the magnitude of the horizontal net force that slows the 110
N sled? (Assume ag = 9.81 m/s  .) a. | 130 N | c. | 37 N | b. | 34 N | d. | 13 N |
|
|
|
13.
|
The statement by Newton that for every action there is an equal but opposite
reaction is which of his laws of motion?
a. | first | c. | third | b. | second | d. | fourth |
|
|
|
14.
|
A hammer drives a nail into a piece of wood. Identify an action-reaction pair in
this situation.
a. | The nail exerts a force on the hammer; the hammer exerts a force on the
wood. | b. | The hammer exerts a force on the nail; the wood exerts a force on the
nail. | c. | The hammer exerts a force on the nail; the nail exerts a force on the
hammer. | d. | The hammer exerts a force on the nail; the hammer exerts a force on the
wood. |
|
|
|
15.
|
A ball is dropped from a person’s hand and falls to Earth. Identify an
action-reaction pair in this situation.
a. | The hand exerts a force on the ball; Earth exerts a force on the
hand. | b. | Earth exerts a force on the ball; the hand exerts a force on
Earth. | c. | Earth exerts a force on the hand; the hand exerts a force on the
ball. | d. | Earth exerts a force on the ball; the ball exerts a force on
Earth. |
|
|
|
16.
|
A sled weighing 1.0 ´ 10  N is held in place
on a frictionless 20.0 ° slope by a rope attached to a stake at the
top. The rope is parallel to the slope. What is the normal force of the slope acting on the
sled?
|
|
|
17.
|
A book with a mass of 2.0 kg is held in equilibrium on a board with a slope of
60.0° by a horizontal force. What is the normal force exerted on the
book?
|
|
|
18.
|
Which of the following is the tendency of an object to maintain its state of
motion?
a. | acceleration | c. | force | b. | inertia | d. | velocity |
|
|
|
19.
|
A late traveler rushes to catch a plane, pulling a suitcase with a force
directed 30.0° above the horizontal. If the horizontal component of
the force on the suitcase is 60.6 N, what is the force exerted on the handle?
a. | 53.0 N | c. | 65.2 N | b. | 70.0 N | d. | 95.6 N |
|
|
|
20.
|
A waitperson carrying a tray with a platter on it tips the tray at an angle of
12° below the horizontal. If the gravitational force on the platter
is 5.0 N, what is the magnitude of the force parallel to the tray that tends to cause the platter to
slide down the tray? (Disregard friction.)
a. | 0.42 N | c. | 4.9 N | b. | 1.0 N | d. | 5.0 N |
|