5 pt.
5 pt.
5 pt.
5 pt.
5 pt.
10 pt.
10 pt.
10 pt.
10 pt.
10 pt.
15 pt.
15 pt.
15 pt.
15 pt.
15 pt.
20 pt.
20 pt.
20 pt.
20 pt.
20 pt.
25 pt.
25 pt.
25 pt.
25 pt.
25 pt.
1-5
A boat moves normally through
the water at a velocity of 5 mph.
How fast will the boat be
traveling, as seen from shore,
going upstream in a river that
moves at 3.5 mph?
1-5A
A boat moves normally through
the water at a velocity of 5 mph.
How fast will the boat be
traveling, as seen from shore,
going upstream in a river that
moves at 3.5 mph?
1.5 mph
A plane wants to 1-10
fly due West, but
there is a strong crosswind to the
North. Draw a vector diagram
illustrating what direction the plane
should aim to achieve its goal.
A plane wants to1-10A
fly due West, but
there is a strong crosswind to the
North. Draw a vector diagram
illustrating what direction the plane
should aim to achieve its goal.
resultant
wind
plane
1-15
1
2
3
VR
Which path should the swimmer
follow to get to the opposite shore
the quickest?
1-15A
1
2
3
VR
Which path should the swimmer
follow to get to the opposite shore
the quickest?
Path #2
1-20
A plane travels 100 km/hr due
North in a strong crosswind
headed 100 km/hr due East. How
fast is the plane’s ground-speed?
A)
B)
C)
D)
0 km/hr
141 km/hr
200 km/hr
not enough info
1-20A
A plane travels 100 km/hr due
North in a strong crosswind
headed 100 km/hr due East. How
fast is the plane’s ground-speed?
B) 141 km/hr
1-25 straight across a
A boat is attempting to move
river. The boat normally moves at 25 mph, and
the river is moving at 16 mph as shown. How fast
will the boat end up traveling across the river?
River
?
A boat is attempting to 1-25A
move straight across a
river. The boat normally moves at 25 mph, and
the river is moving at 16 mph as shown. How fast
will the boat end up traveling across the river?
16 mph
V
162 + V2 = 252
V2 = 252 - 162
V = √(252 - 162)
V = 19.2 mph
2-5
A stone is thrown from
the top of a
cliff horizontally at a speed of 10
m/sec, while at the same time an
identical stone is dropped from the
cliff. Neglecting air drag, which one
hits the ground first?
A stone is thrown 2-5A
from the top of a
cliff horizontally at a speed of 10
m/sec, while at the same time an
identical stone is dropped from the
cliff. Neglecting air drag, which one
hits the ground first?
They both hit at the same time
Fill in the Blanks:2-10
When an projectile is thrown
horizontally, before it hits the ground
its horizontal velocity ______________
and its vertical velocity ____________?
Fill in the Blanks:2-10A
When an projectile is thrown
horizontally, before it hits the ground
remains the same
its horizontal velocity ______________
increases
and its vertical velocity ____________?
A baseball thrown2-15
from the pitcher’s
mound travels 145 kph before hitting
the ground 1.5 sec later. How far (in
meters) is it from the mound to where
the ball hits?
A baseball thrown2-15A
from the pitcher’s
mound travels 145 kph before hitting
the ground 1.5 sec later. How far (in
meters) is it from the mound to where
the ball hits?
vx =145 km/hr (1000 m/km) (hr/3600 sec) = 40.3 m/s
dx = vx t = (40.3 m)(1.5 sec) = 60.4 meters
2-20
A dart is fired horizontally
from a toy
gun at a speed of 30 cm/sec from a
height of 0.45 m. How much time
passes before the dart hits the ground?
2-20A
A dart is fired horizontally
from a toy
gun at a speed of 30 cm/sec from a
height of 0.45 m. How much time
passes before the dart hits the ground?
dy = (1/2)ayt2 ==> t = √[2 dy/ay]
t = √[(2*0.45m)/(9.8m/s2)]
t = 0.30 seconds
A softball is tossed from
2-25 a tree house 4
meters tall, and the ball lands 20 meters
from the tree house. How fast was the ball
thrown?
A softball is tossed from
2-25A a tree house 4
meters tall, and the ball lands 20 meters
from the tree house. How fast was the ball
thrown?
dx = vx t and
dy = (1/2)ayt2 ==> t = √(2 dy/ay)
where  dy = 4 m
t = √[2(4 m)/(10 m/s2] = 0.894 sec
v = dx / t = 20m / 0.894 sec
v = 22.4 m/sec
3-5
A cannonball is launched at a speed of
25.2 m/sec upwards at an angle of 30º
above the horizontal. What is the
acceleration of the ball in the air?
3-5A
A cannonball is launched at a speed of
25.2 m/sec upwards at an angle of 30º
above the horizontal. What is the
acceleration of the ball in the air?
9.8
2
m/sec straight
down
3-10
A water balloon is launched with a
horizontal velocity of 10 m/s and a
vertical velocity of 8 m/s. How fast is
the balloon traveling at the top of its
path?
3-10A
A water balloon is launched with a
horizontal velocity of 10 m/s and a
vertical velocity of 8 m/s. How fast is
the balloon traveling at the top of its
path?
10 m/s because the horizontal velocity
of a projectile is constant
3-15
3-15A
If an object is launched upwards at 24 m/s
and sideways at 12 m/s, how much time
will it take before it reaches the top?
vfy = viy + ayt,
vfy = 0 m/s (top)
-viy = ayt ==> t = -viy / ay
t = -(24 m/s) / (-10 m/s2) = 2.4 sec
3-20
If a ball is launched
upwards from the
moving cup, as shown, where will it
land relative to the cup?
A)
B)
C)
D)
in front of the cup
behind the cup
inside the cup
not enough info
3-20A
If a ball is launched
upwards from the
moving cup, as shown, where will it
land relative to the cup?
C) inside the cup
A water balloon is launched
up at 6.5 m/s
3-25
and sideways at 4 m/s. How far
(horizontally) does it travel before hitting
the ground?
A water balloon is launched
up at 6.5 m/s
3-25A
and sideways at 4 m/s. How far
(horizontally) does it travel before hitting
the ground?
vfy = viy + ayt,
vfy = 0 m/s (top) ==> -viy = ayt
t = -viy / ay ==> t = -(6.5 m/s) / (-10 m/s2) = 0.65 sec
time of flight = 2t = 1.3 sec
dx = vxt = (4 m/s)(1.3 sec) = 5.2 meters
4-5
What is the horizontal
‘part’
of an angled vector called?
4-5A
What is the horizontal
‘part’
of an angled vector called?
The horizontal
‘component’
Draw this vector, 4-10
then draw and label
the component vectors.
A
Draw this vector,4-10A
then draw and label
the component vectors.
Ax
A
Ay
How can you calculate
the vertical
4-15
component of vector B?
(Draw a vector diagram along with your answer)
How can you calculate
the vertical
4-15A
component of vector B?
(Draw a vector diagram along with your answer)
B
By
θ
Bx
By = Bsinθ
Vector C has a magnitude
of 20 m/s
4-20
and is at an angle of 30° above the
horizontal. What is the vertical
component of vector C?
Vector C has a magnitude
of 20 m/s
4-20A
and is at an angle of 30° above the
horizontal. What is the vertical
component of vector C?
Cy = Csinθ
0
Cy = (20m/s)sin(30 )
Cy = 10m/s
Vector D has a magnitude
of 80 m and
4-25
is at an angle of 60° above the
horizontal. What is the horizontal
component of vector D?
Vector D has a magnitude
of 80 m and
4-25A
is at an angle of 60° above the
horizontal. What is the horizontal
component of vector D?
Dx = Dcosθ
0
Dx = (80m/s)cos(60 )
Dx = 40 m
5-5
How many sides does a
circle have?
5-5A
How many sides does a
circle have?
Two… the inside and
the outside!
5-10
Name the character
and movie that
produced this famous quote:
“Archaeology is the search for fact, not
truth.”
5-10A
Indiana Jones, in
Indiana Jones
and the Last Crusade
5-15
On the original Star Trek series,
what were the call letters of the
Star Ship Enterprise?
5-15A
NCC-1701
5-20 Marty McFly
Name the encore song
played at the school dance that was
rumored to have inspired Chuck
Berry’s ‘new’ Rock & Roll song.
5-20A
Johnny B. Goode!
Alternate ending!!!
5-25
What is the answer to
the Ultimate Question
of Life, the Universe,
and Everything?
5-25A
Don’t Panic!
42
So long, and
thanks for all
the fish!
Daily Double
If an object is launched upwards at 24 m/s
and sideways at 12 m/s, how much time
will it take before it reaches the top?