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


1.

An airplane is flying at 635 km per hour at an altitude of 35,000 m. It is
currently over Kansas and is approximately 16 minutes ahead of its scheduled arrival time. What is
its velocity?
a.  635 km/h  b.  16 m/min  c.  35 000
m/s  d.  This cannot be determined without further information about its
direction. 


2.

The SI unit for speed is
a.  mph.  c.  m/s.  b.  ft/s^{2}.  d.  Dv /
t. 


3.

On a speedtime graph, a line with a negative slope indicates that the object
is
a.  speeding up.  c.  not moving.  b.  slowing down.  d.  traveling at a constant
speed. 


4.

The combination of all of the forces acting on an object is called the
a.  total force.  c.  super force.  b.  union of forces.  d.  net force. 


5.

If the net force acting on a stationary object is zero, then the object
will
a.  accelerate in the direction of the strongest force.  b.  remain at
rest.  c.  begin moving backwards.  d.  decelerate at a steady rate of
speed. 


6.

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. 


7.

A tugofwar 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. 


8.

Which of the following best illustrates balanced forces?
a.  a rock falling to the ground  b.  a stretched rubber band being held between two
hands  c.  a person lifting a heavy box off of the ground  d.  a crash between a
large truck and a train 


9.

A force is continuously applied to an object, causing it to accelerate. After a
period of time, however, the object stops accelerating. What conclusion 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. 


10.

Which of the following statements is true?
a.  Frictional forces are greatest when both surfaces are rough.  b.  When a truck is
parked on a hill, friction pulls the truck down the hill.  c.  Air resistance
always opposes friction.  d.  Friction can exist between two objects even
when they are not in contact. 


11.

An object is in motion when
a.  you observe the object move.  b.  the object’s speed
increases.  c.  the object’s displacement is greater than the distance
traveled.  d.  the object changes position relative to a stationary reference
point. 


12.

Which straightline acceleration indicates an increase in speed?
a.  0 m/s^{2}  c.  4 m/s^{2}  b.  15
m/s^{2}  d.  All of the
above 


13.

Which of the following speeds is the most accurate?
a.  100 miles per day  c.  100 miles per minute  b.  100 miles per hour  d.  100 miles per
second 


14.

How can the friction on a water slide be reduced?
a.  warm the surface of the slide  b.  keep the surface of the slide
dry  c.  run a constant stream of water down the slide  d.  increase the slope
of the slide 


15.

Which is an example of balanced forces acting on an object?
a.  a kangaroo jumping  c.  a cyclist slowing down  b.  a car turning a
corner  d.  a leaf lying on the
grass 


16.

A car is parked on a hill. In order to keep the car from rolling downhill, how
great must the static friction acting on the car be?
a.  equal to the force pulling the car downhill  b.  greater than the
force pulling the car downhill  c.  greater than the force pulling the car
uphill  d.  smaller than the force pulling the car uphill 


17.

An object that changes position relative to a reference point is
a.  stationary.  c.  moving at constant speed.  b.  in
motion.  d.  moving at constant
velocity. 


18.

Average speed can be represented by the mathematical expression
a.  distance/time.  c.  time –
distance.  b.  distance ´ time.  d.  time +
distance. 


19.

The _____ of an object consists of its speed and direction.
a.  velocity  c.  average speed  b.  instantaneous speed  d.  displacement 


20.

The average speed of a runner who runs 500.0 m in 1.6 min is
a.  0.19 m/s.  c.  96 m/s.  b.  5.2 m/s.  d.  312 m/s. 


21.

A car moving at an average speed of 55.0 mi/h for 4.25 h has traveled
a.  0.08 mi.  c.  55 mi.  b.  13 mi.  d.  234 mi. 


22.

On a distance vs. time graph of an object’s motion, distance is
usually
a.  plotted on the xaxis.  c.  the dependent
variable.  b.  greater than time.  d.  measured in ft/min. 


23.

A pitcher throws a baseball to home plate, a distance of 60.5 ft. The ball
reaches home plate in 0.63 s. What is the velocity of the ball?
a.  38 ft/s  c.  96 ft/s  b.  38 ft/s toward home plate  d.  96 ft/s toward home
plate 


24.

When the motion of an object is shown by a straight line on a distance vs. time
graph with distance on the yaxis, the slope of the line is the
a.  distance traveled.  c.  speed.  b.  displacement.  d.  time of travel. 


25.

On a bus traveling north at 20.0 m/s, a child stands up and walks toward the
back of the bus at 1.3 m/s. What is the child’s resultant velocity?
a.  18.7 m/s north  c.  21.3 m/s north  b.  18.7 m/s south  d.  21.3 m/s south 


26.

Displacement must always indicate
a.  velocity.  c.  speed.  b.  direction.  d.  time. 


27.

Speeding up, slowing down, and changing direction is best described as
a.  velocity.  c.  displacement.  b.  distance.  d.  acceleration. 


28.

When centripetal acceleration occurs, an object
a.  speeds up.  c.  changes direction.  b.  slows down.  d.  is stationary. 


29.

The equation for finding average acceleration for straightline motion is
a.  initial velocity – final velocity ´
time.  b.  final velocity – initial velocity/time.  c.  initial velocity +
final velocity + time.  d.  initial velocity + final velocity –
time. 


30.

Moving from 0 m/s to 25 m/s in 8.0 s equals an average acceleration of
a.  0.32 m/s.  c.  3.1 m/s.  b.  0.32 m/s^{2}.  d.  3.1
m/s^{2}. 


31.

A cyclist is traveling at an initial speed of 10.0 m/s. She accelerates at a
rate of 0.500 m/s^{2}. What is her final speed after 9.0 s?
a.  14.5 m/s  c.  5.5 m/s  b.  14.5 m/s^{2}  d.  5.5
m/s^{2} 


32.

Peter runs in a constant direction on a straight road. The velocity vs. time
graph of Peter’s motion shows a straight line with a negative slope. What does the line tell
you about Peter’s speed?
a.  It is increasing.  c.  It is decreasing, then increasing.  b.  It is
decreasing.  d.  It is
constant. 


33.

When velocity changes by the same amount over each time interval, acceleration
is
a.  zero.  c.  positive.  b.  constant.  d.  negative. 


34.

On a velocity vs. time graph, what shows the value of the acceleration?
a.  the slope of the line  c.  the yaxis  b.  the xaxis  d.  the final
velocity 


35.

A cheetah can accelerate at up to 6.0 m/s^{2}. How long does it take for
a cheetah to speed up from 10.5 m/s to 12.2 m/s?
a.  0.28 s  c.  3.5 s  b.  1.7 s  d.  10 s 


36.

What happens when a car slows down and velocity changes?
a.  positive acceleration  c.  negative acceleration  b.  resultant
acceleration  d.  constant
acceleration 


37.

Net force is
a.  the force acting in the same direction as an object’s
movement.  b.  the force acting in the opposite direction of an object’s
movement.  c.  the combination of all the forces acting on an object.  d.  the force of gravity
pulling an object down. 


38.

An object experiencing balanced forces
a.  has a net force of zero.  c.  is slowing
down.  b.  is speeding up.  d.  stops moving. 


39.

A game of tugofwar is an example of
a.  rolling friction.  c.  streamlining.  b.  air resistance.  d.  unbalanced
forces. 


40.

Which is an example of static friction?
a.  pulling a skier behind a boat  c.  braking a car going down a
hill  b.  pushing a box that is at rest  d.  driving a car up a
hill 
