Transcript Jeopardy Review

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 is sitting on the
A physics textbook
table in front of you. Are there any
forces acting on it? (Draw a FBD)
1-5A is sitting on the
A physics textbook
table in front of you. Are there any
forces acting on it? (Draw a FBD)
FN
Yes, the book’s
weight pulling
down and the
table pushing up.
Fg
Which string1-10
pulls harder on
the hanging mass?
1
2
Which string1-10A
pulls harder on
the hanging mass?
FT1
FT2
Fg
1
2
String #1
Draw a free-body 1-15
diagram of the forces
acting on the object below. It is a stone
sliding (with friction) down a ramp.
Label all forces!
Draw a free-body1-15A
diagram of the forces
acting on the object below. It is a stone
sliding (with friction) down a ramp.
Label all forces!
Fg
1-20 string below is
If the ball on the
accelerated upwards at 20 m/s2, draw
the string and weight forces to scale…
If the ball on 1-20A
the string below is
accelerated upwards at 20 m/s2, draw
the string and weight forces to scale…
FT is
3x longer
than Fg
FT
Fg
Fnet = 2x Fg
1-25
Type question here.
Adjust size & position
as necessary.
1-25A
Two hockey players are pushing on a puck
as it travels across the ice. Their force
vectors are shown below. What is the
resultant force experienced by the puck?
130 N
Fnet
100 N
Fnet = √(1002 + 1302)
Fnet = 164 N
52o
Above x axis
2-5
1
3
2
Along which path will the ball
move once it hits the gap?
2-5A
1
3
2
Along which path will the ball
move once it hits the gap?
Path #2
True 2-10
or False:
It is possible for an object to be
moving and still be in equilibrium.
True 2-10A
or False:
It is possible for an object to be
moving and still be in equilibrium.
True – So long as there is no acceleration
or change in motion, the object is
in equilibrium (FNet = 0 N).
Resistance
Pull
2-15
A car on a race track
travels around
the circular track at a constant speed.
Is it in equilibrium?
2-15A travels around
A car on a race track
the circular track at a constant speed.
Is it in equilibrium?
No – because in order for the
car to move in a circle, there has to be
a net force causing a change in the
car’s direction.
You and a friend
2-20 push a heavy
crate across the floor at a constant
speed. If you push with a combined
force of 100 N, how hard is friction
pushing back on the crate?
A)
B)
C)
D)
less than 100 N
100 N exactly
more than 100 N
not enough info
You and a friend
2-20A push a heavy
crate across the floor at a constant
speed. If you push with a combined
force of 100 N, how hard is friction
pushing back on the crate?
A)
B)
C)
Ff = 100D)
N
less than 100 N
100 N exactly
more than 100 N
not enough info
Fpush = 100 N
Suppose you are2-25
in an elevator as it
accelerates upwards. At that moment,
you would feel ________. Why is this?
Suppose you are2-25A
in an elevator as it
accelerates upwards. At that moment,
you would feel ________. Why is this?
Heavier than normal:
This is because as the elevator
accelerates upwards, you resist that
change (due to your inertia), so you
feel pressed against the floor harder.
Thus, its your reaction to the floor
pushing you upward that makes you
feel heavier than normal.
FN
Fg
Two objects (one 10-kg
3-5 and one 20-kg) are
pressed on by the same force. Which one
will accelerate more, and by how much?
Two objects (one 10-kg
3-5A and one 20-kg) are
pressed on by the same force. Which one
will accelerate more, and by how much?
The 10-kg object will
accelerate by 2x more.
10 kg
F = (1/2m)(2a)
20 kg
F = (2m) (1/2 a)
3-10 of a 50-kg object
What is the weight
as it falls at a speed of 100 m/sec
in a vacuum?
3-10A of a 50-kg object
What is the weight
as it falls at a speed of 100 m/sec
in a vacuum?
The speed of the object has no
effect on its weight, so…
Fg = mg = (50 kg)(10 m/sec2)
Fg = 500 Newtons
Fg
A 1,000 kg rocket3-15
launches up through
the atmosphere pushed by a thrust of
20,000 N. If the air drag is 8,000 N,
then what is the acceleration of the
rocket?
A 1,000 kg rocket3-15A
launches up through
the atmosphere pushed by a thrust of
20,000 N. If the air drag is 8,000 N,
then what is the acceleration of the
rocket?
FThrust
FThrust – FDrag – Fg = ma
20,000N–8,000N–10,000N = 1000kg*a
FDrag
a = 2 m/s2
Fg
A person drives a car down
3-20 a straight road while
continually increasing pressure on the gas pedal
(thus increasing the accelerating force of the car).
Sketch a V-t Graph for the car (SI).
A person drives a car 3-20A
down a straight road while
continually increasing pressure on the gas pedal
(thus increasing the accelerating force of the car).
Sketch a V-t Graph for the car (SI).
Velocity (m/s)
Velocity vs Time
Time (s)
A 75-kg parachutist is
falling through the air –
3-25
while experiencing an air drag of 200 N. If he falls
from rest for 10 seconds in this manner, how fast is
he moving?
A 75-kg parachutist 3-25A
is falling through the air –
while experiencing an air drag of 200 N. If he falls
from rest for 10 seconds in this manner, how fast is
he moving?
v = at so we must find a…
Ff
Fnet = Weight – Drag = ma
So… (75 kg)(10 m/s2) – 200 N = (75 kg)a
550 N/75 kg = 7.33 m/s2 = a
v = (7.33 m/s2)(10 sec) = 73.3 m/sec
Fg
When you bounce4-5off of a trampoline,
the force exerted on you by the
trampoline is ______ as compared to
the force you exert back on it.
A)
B)
C)
D)
greater than
the same
less than
not enough info
When you bounce4-5A
off of a trampoline,
the force exerted on you by the
trampoline is ______ as compared to
the force you exert back on it.
A)
B)
C)
D)
greater than
the same
less than
not enough info
4-10
What is the reaction
force that propels
a rocket such as the Space Shuttle?
A)
B)
C)
D)
E)
the rocket pushing against the launch pad
the force from the atmosphere
gravity’s pull from the Earth
the exhaust gas pushing on the rocket
not enough info
4-10A
What is the reaction
force that propels
a rocket such as the Space Shuttle?
A)
B)
C)
D)
E)
the rocket pushing against the launch pad
the force from the atmosphere
gravity’s pull from the Earth
the exhaust gas pushing on the rocket
not enough info
A Honda Civic 4-15
and an 18-wheeler
moving at the same speed collide
head-on. Which one experiences a
greater force of impact?
A Honda Civic4-15A
and an 18-wheeler
moving at the same speed collide
head-on. Which one experiences a
greater force of impact?
They both experience the same force,
though the Civic, since it has less mass,
will undergo a greater acceleration.
4-20
Two students, Small
Sid and Big
Barney, are playing tug-of-war
with a rope. Which of them pulls
harder on the rope?
Two students, 4-20A
Small Sid and Big
Barney, are playing tug-of-war
with a rope. Which of them pulls
harder on the rope?
Neither pulls harder – they
exert equal and opposing
forces on the rope.
4-25surface of the Earth.
A 1-N pear sits on the
What is the Earth’s weight in reference to
this pear? (Note that I’m not asking for the
Earth’s mass!)
4-25A
A 1-N pear sits on the
surface of the Earth.
What is the Earth’s weight in reference to
this pear? (Note that I’m not asking for the
Earth’s mass!)
1 Newton
The Earth’s weight depends on the object you’re
measuring it against. So since the Earth pulls on
the pear with a force of 1-N, the pear pulls back
on the Earth gravitationally with a
force of 1-N.
What’s the5-5punch line?
“A neutron walks into a bar; he asks the
bartender, 'How much for a beer?' The
bartender looks at him, and says…”
5-5A
What’s the
punch line?
“A neutron walks into a bar; he asks the
bartender, 'How much for a beer?' The
bartender looks at him, and says…”
'For you, no charge.'
5-10 and movie that
Name the character
produced this famous quote:
“Bye-bye boys, have fun
storming the castle!”
5-10A
Miracle
Max, in
The Princess Bride
5-15
th
On October 19 , 2004, what bigname politician publicly endorsed
his state’s ballot initiative that
would provide $3 billion in funding
for stem-cell research?
5-15A
Arnold Schwarzenegger,
(former) governor of California
5-20
He was born Gordon Matthew
Sumner, but his rock concert
tickets read…
5-20A
He was born Gordon Matthew
Sumner, but his rock concert
tickets read…
Sting
5-25
On the TV series “Knight Rider,”
What was the name of the car?
(BONUS Points for what the acronym stands for!)
5-25A
K
I
T
T
= Knight
= Industries
= Two
= Thousand
Daily Double
Two hockey players are pushing on a puck
as it travels across the ice. Their force
vectors are shown below. What is the
resultant force experienced by the puck?
130 N
100 N