Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.




 1.  According to the graph above, during which interval is the cat at
rest? a.  0.0–5.0
s  c.  10.0–15.0
s  b.  5.0–10.0
s  d.  15.0–20.0
s     

 2.  According to the graph above, during which interval does the cat have the greatest
positive velocity? a.  0.0–5.0 s  c.  10.0–15.0 s  b.  5.0–10.0
s  d.  15.0–20.0
s     

 3.  Acceleration is defined as a.  a rate of displacement.  c.  the change in velocity.  b.  the rate of
change of displacement.  d.  the rate of
change of velocity.     

 4.  Which
of the following is the equation for acceleration?

 5.  When
a car’s velocity is positive and its acceleration is negative, what is happening to the
car’s motion? a.  The car slows down.  c.  The car travels at constant speed.  b.  The car speeds
up.  d.  The car remains
at rest.     




 6.  The
graph above describes the motion of a cyclist. The graph illustrates that the acceleration of the
cyclist a.  is
constant.  c.  increases.  b.  decreases.  d.  is zero.     




 7.  What
does the graph above illustrate about acceleration? a.  The acceleration
varies.  b.  The acceleration is zero.  c.  The acceleration
is constant.  d.  The acceleration increases then becomes
constant.   

 8.  In
the graph above, how does the acceleration at A compare with the acceleration at B? a.  The acceleration
at A is positive and less than the acceleration at B.  b.  The acceleration
at B is positive and less than the acceleration at A.  c.  The
accelerations at A and B are each zero.  d.  The accelerations at A and B cannot be
determined.   

 9.  A
baseball catcher throws a ball vertically upward and catches it in the same spot as it returns to the
mitt. At what point in the ball’s path does it experience zero velocity and nonzero acceleration
at the same time? a.  midway on the
way up  b.  at the top of its path  c.  the instant it
leaves the catcher’s hand  d.  the instant before it arrives in the catcher’s
mitt   

 10.  Which
of the following is a physical quantity that has both magnitude and direction? a.  vector  c.  resultant  b.  scalar  d.  frame of reference     

 11.  Which
of the following is an example of a vector quantity? a.  velocity  c.  volume  b.  temperature  d.  mass     




 12.  In
the figure above, which diagram represents the vector addition C = A +
B?

 13.  For
the winter, a duck flies 10.0 m/s due south against a gust of wind with a speed of 2.5 m/s. What is
the resultant velocity of the duck? a.  12.5 m/s south  c.  7.5 m/s south  b.  –12.5 m/s
south  d.  –7.5 m/s
south     

 14.  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
    

 15.  A
track star in the long jump goes into the jump at 12 m/s and launches herself at 20.0° above the
horizontal. What is the magnitude of her horizontal displacement? (Assume no air resistance and that
a = –g = –9.81 m/s.) a.  4.6
m  c.  13
m  b.  9.2
m  d.  15
m     

 16.  Which
of the following is the cause of an acceleration? a.  speed  c.  force  b.  inertia  d.  velocity     

 17.  A
newton is equivalent to which of the following quantities? a.  kg  c.  kg·m/s  b.  kg·m/s  d.  kg·(m/s)     




 18.  The
freebody diagram shown above represents a car being pulled by a towing cable. In the diagram, the
5800 N force is a.  the
gravitational force acting on the car.  b.  the backward force the road exerts on the
car.  c.  the upward force
the road exerts on the car.  d.  the force exerted by the towing cable on the
car.   

 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
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 xaxis 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     

 21.  Which
statement about the acceleration of an object is correct? a.  The acceleration
of an object is directly proportional to the net external force acting on the object and inversely
proportional to the mass of the object.  b.  The acceleration of an object is directly proportional to the
net external force acting on the object and directly proportional to the mass of the
object.  c.  The acceleration of an object is inversely proportional to the
net external force acting on the object and inversely proportional to the mass of the
object.  d.  The acceleration of an object is inversely proportional to the
net external force acting on the object and directly proportional to the mass of the
object.   

 22.  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     

 23.  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
a_{g} = 9.81 m/s.) a.  130
N  c.  37
N  b.  34
N  d.  13
N     

 24.  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?

 25.  What
are the units of the coefficient of friction? a.  N  c.  N  b.  1/N  d.  The coefficient of friction has no
units.     

 26.  An
ice skater moving at 10.0 m/s coasts to a halt in 1.0 ´ 10 m on a smooth
ice surface. What is the coefficient of friction between the ice and the skates? a.  0.025  c.  0.102  b.  0.051  d.  0.205     

 27.  Work
is done when a.  the displacement
is not zero.  b.  the displacement is zero.  c.  the force is
zero.  d.  the force and displacement are
perpendicular.   

 28.  What
is the common formula for work? Assume that W is the work, F is a constant force, v is the change in velocity, and d is
the displacement. a.  W =
FDv  c.  W =
Fd^{}  b.  W =
Fd  d.  W =
F^{}d     

 29.  In
which of the following scenarios is no net work done? a.  A car
accelerates down a hill.  b.  A car travels at constant speed on a flat
road.  c.  A car decelerates on a flat road.  d.  A car
decelerates as it travels up a hill.   

 30.  A
horizontal force of 200 N is applied to move a 55 kg television set across a 10 m level surface. What
is the work done by the 200 N force on the television set? a.  550
J  c.  6000
J  b.  2000
J  d.  11000
J     

 31.  Which
of the following formulas would be used to directly calculate the kinetic energy of an object with
mass m bouncing up and down on a spring with spring constant k?

 32.  Ball
A has triple the mass and speed of ball B. What is the ratio of the kinetic energy of ball A to ball
B.

 33.  What
is the kinetic energy of a 0.135 kg baseball thrown at 40.0 m/s? a.  54.0
J  c.  108
J  b.  87.0
J  d.  216
J     

 34.  A
3.00 kg toy falls from a height of 1.00 m. What will the kinetic energy of the toy be just before the
toy hits the ground? (Assume no air resistance and that g = 9.81 m/s^{}.) a.  0.98 J  c.  29.4 J  b.  9.8
J  d.  294
J     

 35.  Which
of the following are not units of power?

 36.  How
much power is required to lift a 2.0 kg mass at a speed of 2.0 m/s? a.  2.0
J  c.  9.8
J  b.  4.0
J  d.  39
J     

 37.  What
is the average power supplied by a 60.0 kg person running up a flight of stairs a vertical distance
of 4.0 m in 4.2 s? a.  57 W  c.  560 W  b.  240
W  d.  670
W     

 38.  Which
of the following equations can be used to directly calculate an object’s momentum,
p? a.  p =
mv  c.  p =
FDt  b.   d.  Dp = FDt     

 39.  What
are the SI units for momentum? a.  N·m  c.  kg·m/s  b.  J  d.  kg·m/s^{}     

 40.  When
comparing the momentum of two moving objects, which of the following is correct? a.  The object with
the higher velocity will have less momentum if the masses are equal.  b.  The more massive
object will have less momentum if its velocity is greater.  c.  The less massive
object will have less momentum if the velocities are the same.  d.  The more massive
object will have less momentum if the velocities are the same.   

 41.  A
child with a mass of 23 kg rides a bike with a mass of 5.5 kg at a velocity of 4.5 m/s to the south.
Compare the momentum of the child with the momentum of the bike. a.  Both the child
and the bike have the same momentum.  b.  The bike has a greater momentum than the
child.  c.  The child has a greater momentum than the
bike.  d.  Neither the child nor the bike has
momentum.   

 42.  Which
of the following has the greatest momentum? a.  a tortoise with a mass of 275 kg moving at a velocity of 0.55
m/s  b.  a hare with a
mass of 2.7 kg moving at a velocity of 7.5 m/s  c.  a turtle with a
mass of 91 kg moving at a velocity of 1.4 m/s  d.  a roadrunner
with a mass of 1.8 kg moving at a velocity of 6.7 m/s   

 43.  Which
of the following equations can be used to directly calculate the change in an object’s
momentum? a.  p =
mv  c.  p =
FDt  b.   d.  Dp = FDt     

 44.  If a
force is exerted on an object, which statement is true? a.  A large force
always produces a large change in the object’s momentum.  b.  A large force
produces a large change in the object’s momentum only if the force is applied over a very short
time interval.  c.  A small force applied over a long time interval can produce a
large change in the object’s momentum.  d.  A small force
always produces a large change in the object’s momentum.   

 45.  A 0.2
kg baseball is pitched with a velocity of 40 m/s and is then batted to the pitcher with a velocity of
60 m/s. What is the magnitude of change in the ball’s momentum? a.  2 kg·m/s  c.  8 kg·m/s  b.  4 kg·m/s  d.  20 kg·m/s     

 46.  The
law of conservation of momentum states that a.  the total initial momentum of all objects interacting with one
another usually equals the total final momentum.  b.  the total
initial momentum of all objects interacting with one another does not equal the total final
momentum.  c.  the total momentum of all objects interacting with one another
is zero.  d.  the total momentum of all objects interacting with one another
remains constant regardless of the nature of the forces between the
objects.   

 47.  When
an object is moving with uniform circular motion, the centripetal acceleration of the
object a.  is
circular.  b.  is perpendicular to the plane of
motion.  c.  is zero.  d.  is directed
toward the center of motion.   



A
child rides a bicycle in a circular path with a radius of 2.0 m. The tangential speed of the bicycle
is 2.0 m/s. The combined mass of the bicycle and the child is 43 kg.

 48.  What
is the magnitude of the bicycle’s centripetal acceleration? a.  1.0
m/s^{2}  c.  4.0
m/s^{2}  b.  2.0 m/s^{2}  d.  8.0 m/s^{2}     

 49.  Which
of the following equations expresses Newton’s law of universal gravitation?

 50.  Two
small masses that are 10.0 cm apart attract each other with a force of 10.0 N. When they are 5.0 cm
apart, these masses will attract each other with what force?
a.  5.0 N  c.  20.0 N  b.  2.5
N  d.  40.0
N     




 51.  In
the figure above, according to Kepler’s laws of planetary motion, a.  A = A.  c.  if Dt = Dt, then the orbit is
circular.  b.  Dt > Dt.  d.      

 52.  The
equation for the speed of an object in circular orbit is . What does
m represent in this equation? a.  the mass of the sun  c.  the mass of the central object  b.  the mass of
Earth  d.  the mass of the
orbiting object     

 53.  How
would the speed of Earth’s orbit around the sun change if Earth’s mass increased by 4
times? a.  It would
increase by a factor of 2.  c.  It would
decrease by a factor of 2.  b.  It would increase by a factor of
4.  d.  The speed would
not change.     

 54.  Suppose a doorknob is placed at the center of a door. Compared with a door whose knob
is located at the edge, what amount of force must be applied to this door to produce the torque
exerted on the other door? a.  onehalf as much  c.  onefourth as much  b.  two times as
much  d.  four times as
much     

 55.  A
girl pushes a box that has a mass of 450 N up an incline. If the girl exerts a force of 150 N along
the incline, what is the mechanical advantage of the incline?
