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



Figure
111


1.

Examine Figure 111. If you were standing under the tree, which object would
appear to be moving?
a.  the tree  c.  the boy  b.  the airplane  d.  the building 


2.

A passenger in the rear seat of a car moving at a steady speed is at rest
relative to
a.  the side of the road.  c.  the front seat of the car.  b.  a pedestrian on the
corner ahead.  d.  the wheels of
the car. 


3.

Which distance can be most accurately measured with a ruler?
a.  the length of a river  b.  the width of a book  c.  the distance between
two cities  d.  the size of an object under a microscope 


4.

One kilometer equals 1000 meters. What does the prefix kilo mean?


5.

A person walks 1 mile every day for exercise, leaving her front porch at 9:00
am. and returning to her front porch at 9:25 am. What is the total displacement of her daily
walk?
a.  1 mile  c.  25 minutes  b.  0  d.  none of the
above 


6.

A person drives north 6 blocks, then turns west, and drives 6 blocks. The driver
then turns south and drives 6 blocks. How could the driver have made the distance shorter while
maintaining the same displacement?
a.  by driving west 6 blocks from the starting point  b.  by driving north 4
block and west 7 blocks  c.  by driving south 6 blocks from the starting
point  d.  by driving back to the starting point by the same
route 


7.

A ball is rolled uphill a distance of 5 meters before it slows, stops, and
begins to roll back. The ball rolls downhill 9 meters before coming to rest against a tree. What is
the magnitude of the ball’s displacement?
a.  4 meters  c.  14 meters  b.  9 meters  d.  45 meters 


8.

Displacement vectors of 4 km south, 2 km north, 5 km south, and 5 km north
combine to a total displacement of
a.  16 km north  c.  6 km south  b.  11 km west  d.  2 km south 


9.

What is the most appropriate SI unit to express the speed of a cyclist in the
last leg of a 10km race?


10.

Speed is the ratio of the distance an object moves to
a.  the amount of time needed to travel the distance.  b.  the direction the
object moves.  c.  the displacement of the object.  d.  the motion of the
object. 


11.

Instantaneous speed is measured
a.  at the starting point.  b.  when the object reaches its
destination.  c.  at a particular instant.  d.  over the duration of the
trip. 


12.

A car traveled 60 km in 2 hours, 84 km in the next 1 hour, and then 68 km in 2
hours before reaching its destination. What was the car’s average speed?
a.  212 km/h  c.  148 km/h  b.  42 km/h  d.  1060 km/h 


13.

The slope of a line on a distancetime graph is
a.  distance.  c.  speed.  b.  time.  d.  displacement. 


14.

A horizontal line on a distancetime graph means the object is
a.  moving at a constant speed.  c.  slowing down.  b.  moving
faster.  d.  at
rest. 


15.

What is the speed of a bobsled whose distancetime graph indicates that it
traveled 100 m in 25 s?
a.  4 m/s  c.  0.25 mph  b.  2500 m/s  d.  100 m/s 


16.

A distancetime graph indicates that an object moves 100 m in 4 s and then
remains at rest for 6 s. What is the average speed of the object?
a.  50 m/s  c.  10 m/s  b.  25 m/s  d.  100 m/s 


17.

A river current has a velocity of 5 km/h relative to the shore, and a boat moves
in the same direction as the current at 5 km/h relative to the river. How can the velocity of the
boat relative to the shore be calculated?
a.  by subtracting the river current vector from the boat’s velocity
vector  b.  by dividing the river current vector by the boat’s velocity
vector  c.  by multiplying the vectors  d.  by adding the
vectors 


18.

Vector addition is used when motion involves
a.  more than one direction.  c.  more than one
speed.  b.  more than one velocity.  d.  all of the above 


19.

The rate at which velocity changes is called
a.  speed.  c.  acceleration.  b.  vectors.  d.  motion. 


20.

Which example identifies a change in motion that produces acceleration?
a.  a speed skater moving at a constant speed on a straight track  b.  a ball moving at a
constant speed around a circular track  c.  a particle moving in a vacuum at constant
velocity  d.  a vehicle moving down the street at a steady speed 


21.

Objects in free fall near the surface of the Earth experience
a.  constant speed.  c.  constant acceleration.  b.  constant
velocity.  d.  constant
distance. 


22.

Which example describes constant acceleration due ONLY to a change in
direction?
a.  increasing speed while traveling around a curve  b.  an object at
rest  c.  traveling around a circular track  d.  an object in free
fall 


23.

Suppose you increase your walking speed from 1 m/s to 3 m/s in a period of 1 s.
What is your acceleration?
a.  2 m/s^{2}  c.  4 m/s^{2}  b.  5 m/s^{2}  d.  3
m/s^{2} 


24.

An object moving at 30 m/s takes 5 s to come to a stop. What is the
object’s acceleration?
a.  30 m/s^{2}  c.  –6 m/s^{2}  b.  –30
m/s^{2}  d.  6
m/s^{2} 


25.

The slope of a speedtime graph indicates
a.  direction.  c.  velocity.  b.  acceleration.  d.  speed. 
