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Speed And Velocity 1
Test Description: Speed and velocity
Instructions: Answer all questions to get your test result.
1) If you were standing under a tree, which object would appear to be moving?
A
the airplane
B
the boy
C
the tree
D
the building
2) A passenger in the rear seat of a car moving at a steady speed is at rest relative to
A
a pedestrian on the corner ahead
B
the side of the road
C
the front seat of the car
D
the wheels of the car
3) Which distance can be most accurately measured with a ruler?
A
the size of an object under a microscope
B
the width of a book
C
the length of a river
D
the distance between two cities
4) One kilometer equals 1000 meters. What does the prefix kilo- mean?
A
10
B
1000
C
1
D
100
5) What is the most appropriate SI unit to express the speed of a cyclist in the last leg of a 10 km race?
A
km/s
B
cm/h
C
mm/s
D
km/h
6) Speed is the ratio of the distance an object moves to
A
the direction the object moves
B
the displacement of the object
C
the motion of the object
D
the amount of time needed to travel the distance
7) Instantaneous speed is measured
A
when the object reaches it destination
B
at a particular instant
C
over the duration of the trip
D
at the starting point
8) The slope of a line on a distance-time graph is
A
speed
B
displacement
C
time
D
distance
9) The rate at which velocity changes is called
A
vectors
B
motion
C
acceleration
D
speed
10) Which example identifies a change in motion that produces acceleration?
A
a vehicle moving down the street at a steady speed
B
a ball moving at a constant speed around a circular track
C
a particle moving in a vaccuum at constant velocity
D
a speed skater moving at a constant speed on a straight track
11) Objects in free fall near the surface of the Earth experience
A
constant distance
B
constant speed
C
constant velocity
D
constant acceleration
12) Which example describes constant acceleration due ONLY to a change in direction?
A
traveling around a circular track
B
an object in free fall
C
an object at rest
D
increasing speed while traveling around a curve
13) The slope of a speed-time graph indicates
A
speed
B
acceleration
C
velocity
D
direction
14) An object that is accelerating may be
A
slowing down
B
changing direction
C
gaining speed
D
all of the above
15) What is instantaneous acceleration?
A
how fast a velocity is changing at a specific instant
B
how fast a direction is changing at a specific instanct
C
all of the above
D
how fast a speed is changing at a specific instant
16) Which of the following statements is true?
A
instantaneous acceleration is always changing
B
an object at rest has an instantaneous acceleration of zero
C
an object that is accelerating is always changing direction
D
an object that has an instantaneous acceleration, even if the acceleration vector is zero
*select an answer for all questions
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