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Exam
Name___________________________________
MULTIPLE
CHOICE.
Choose
the
one
alternative
that
best
completes
the
statement
or
answers
the
question.
1) Acceleration
is
sometimes
expressed
in
multiples
of
g,
where
g
=
9.8
m/s
2
is
the
acceleration
due
to
the
Earth's
gravity.
In
a
car
crash,
the
car's
velocity
may
go
from
26
m/s
to
0
m/s
in
0.15
s.
How
many
g's
are
experienced,
on
average,
by
the
driver?
A) 13
g
B) 22
g
C) 18
g
D) 23
g
1)
2) A
car
accelerates
from
10.0
m/s
to
30
m/s
at
a
rate
of
3.0
m/s
2
.
How
far
does
it
travel
while
accelerating?
A) 80
m
B) 133
m
C) 226
m
D) 399
m
2)
Situation
2.1
A
rock
is
projected
upward
from
the
surface
of
the
moon,
at
time
t
=
0.0
s,
with
a
velocity
of
30
m/s.
The
acceleration
due
to
gravity
at
the
surface
of
the
moon
is
1.62
m/s
2
.
3) In
Situation
2.1,
the
time
when
the
rock
is
ascending
at
a
height
of
180
m
is
closest
to:
A) 12
s
B) 23
s
C) 30
s
D) 17
s
E) 8
s
3)
4) In
Situation
2.1,
the
height
of
the
rock
when
it
is
descending
with
a
velocity
of
20
m/s
is
closest
to:
A) 125
m
B) 115
m
C) 135
m
D) 155
m
E) 145
m
4)
5) In
Situation
2.1,
the
average
velocity
of
the
rock
during
the
Frst
22.0
s
of
±ight
is
closest
to:
A) 14
m/s
B) 18
m/s
C) 12
m/s
D) 10
m/s
E) 16
m/s
5)
6) Two
identical
objects,
A
and
B,
fall
from
rest
from
different
heights
to
the
ground.
If
object
B
takes
twice
as
long
as
A
to
reach
the
ground,
what
is
the
ratio
of
the
heights
from
which
A
and
B
fell?
Neglect
air
resistance.
A) 1
:
8
B) 1
:
2
C) 1
:
2
D) 1
:
4
6)
7) A
ball
is
thrown
vertically
upward
and
then
comes
back
down.
During
the
ball's
±ight
up
and
down,
its
velocity
and
acceleration
vectors
are
.
.
.
A) Frst
in
the
same
direction
and
then
in
opposite
directions.
B) Frst
in
opposite
directions
and
then
in
the
same
direction.
C) always
in
the
same
direction.
D) always
in
opposite
directions.
7)
8) A
stone
is
thrown
vertically
upwards,
reaches
a
highest
point,
and
returns
to
the
ground.
When
the
stone
is
at
the
top
of
its
path,
its
acceleration
A) is
zero.
B) changes
direction
from
upwards
to
downwards.
C) is
directed
downwards.
D) is
directed
upwards.
8)
1
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View Full Document9) A
hobby
rocket
reaches
a
height
of
72.3
m
and
lands
111
m
from
the
launch
point.
What
was
the
angle
of
launch?
A) 67.4°
B) 22.6°
C) 69.0°
D)

44.8°
9)
10) Two
cars
are
on
a
head

on
collision
course.
Just
before
the
crash,
one
car's
speedometer
reads
59
km/h
and
the
other
one
reads
81
km/h.
What
is
the
speed
of
the
Frst
car
relative
to
the
second
car?
A) 69
km/h
B) 27
km/h
C) 22
km/h
D) 140
km/h
10)
11) You
throw
a
rock
horizontally
off
a
cliff
with
a
speed
of
20
m/s.
After
two
seconds,
the
total
speed
of
the
rock
is
roughly
A) 20
m/s
B) 40
m/s
C) 37
m/s
D) 28
m/s
11)
12) You
walk
55
m
to
the
north,
then
turn
60°
to
your
right
and
walk
another
45
m.
How
far
are
you
from
where
you
originally
started?
A) 87
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 Spring '08
 Morrison
 Acceleration, Gravity

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