Transcript Jeopardy Energy

Jeopardy
PHY101
Chapter 3 Review
Study of Energy
Study of Energy
Work
Kinetic
Energy
Potential
Energy
Heat &
Power
Conservation
Laws
Potpourri
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Work
$100
What is the definition of work?
ANSWER
Work
$200
What are the units of Work?
ANSWER
Work
$300
What is Energy?
ANSWER
Work
$400
What is the difference between
kinetic and potential energy?
ANSWER
Kinetic Energy
$100
What is the equation
for Kinetic Energy?
ANSWER
Kinetic Energy
$200
What is the equation for
momentum?
ANSWER
Kinetic Energy
$300
What is the equation for
Kinetic Energy using
momentum?
ANSWER
Kinetic Energy
$400
What is the work kinetic
energy theorem?
ANSWER
Potential Energy
$100
What is the equation for
Potential Energy for gravity?
ANSWER
Potential Energy
$200
What is the equation for
Potential Energy for a spring?
ANSWER
Potential Energy
$300
What is the potential energy in
a food calorie?
ANSWER
Potential Energy
$400
How much energy would you
need to keep a 2200 lbs car
moving at 60 miles/hour?
ANSWER
Heat & Power
$100
What is a calorie?
What is a BTU?
ANSWER
Heat & Power
$200
What is internal energy?
ANSWER
Heat & Power
$300
What is power?
ANSWER
Heat & Power
$400
What are the units of Power?
ANSWER
Conservation Laws
$100
What is an open system? What
is a closed system?
ANSWER
Conservation Laws
$200
What is the Law of Conservation
of Linear Momentum?
ANSWER
Conservation Laws
$300
What is the Law of Conservation
of Angular Momentum?
ANSWER
Conservation Laws
$400
What is the Law of
Conservation of Energy?
ANSWER
Potpourri $100
At what frequency would you
put energy into a system?
ANSWER
Potpourri $200
What is the impulse
momentum theorem?
ANSWER
Potpourri $300
Complete the table for linear/ angular conversions
Linear
Displacement
Velocity
Acceleration
Mass
Force
momentum
Angular
d
v
a
m
F
p
ANSWER
Potpourri $400
What is torque?
ANSWER
Work
$100
Answer
What is the definition of work?
Work is force acting through a
displacement where force and
displacement are parallel.
Work = Force * Displacement = Fd
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Work
$200
Answer
What are the units of Work?
SI
cgs
common
1 N*m = 1 Joule
1 dyne*cm = 1 erg
1 ft*lb
1 Joule = 107 ergs =0.738 ft*lbs
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Work
$300
Answer
What is Energy?
Ability to do work.
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Work
$400
Answer
What is the difference between kinetic and potential
energy?
Kinetic Energy is energy of motion.
Potential Energy is energy of position.
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Kinetic Energy
$100
Answer
What is the equation for Kinetic Energy?
K.E. = ½mv²
K.E. = ½m(vF² - vO²)
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Kinetic Energy
$200
Answer
What is the equation for momentum?
Momentum = mass * velocity
p = mv
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SI unit
1 kg*m/s
Kinetic Energy
$300
Answer
What is the equation for Kinetic Energy using
momentum?
K.E. = p²/(2m)
K.E. =(pF² - pO²)/(2m)
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Kinetic Energy
$400
Answer
What is the work kinetic energy theorem?
WorkNET = K.E.
The units are the same for work & energy.
Work +
Work -
K.E.
K.E.
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v
v
Potential Energy
$100
Answer
What is the equation for
Potential Energy for gravity?
P.E. = mgy or mgd
P.E. =mgy
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Potential Energy
$200
Answer
What is the equation for
Potential Energy for a spring?
P.E. = kSx²/2
P.E. = ½kS(xF² - xO²)
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Potential Energy
$300
Answer
What is the potential energy in
a food calorie?
1 Food Calorie = 1 kcal = 4186 J
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Potential Energy
$400
Answer
How much energy would you need to keep a 2200 lbs
car moving at 60 miles/hour?
2200 lbs = 1000 kg
60 miles/hour = 27 m/s
K.E. = ½mv² = 360,000 J = 86 kcal
A medium sized cookie
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Heat & Power
$100
Answer
What is a calorie?
A calorie is the amount of heat need to raise 1 gram of water 1
degree Celsius.
1 cal = 4.186 J
What is a BTU?
A BTU is the amount of heat need to raise 1 pound of water 1
degree Fahrenheit.
1 Back
BTU = to
252
cal = 1055 J
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Heat & Power
$200
Answer
What is internal energy?
EINT = resistive force * distance = fd
We see this as heat.
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Heat & Power
$300
Answer
What is power?
Average Power is Work done/Time Average
Power = Work/t
Instantaneous Power = force * velocity = Fv
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Heat & Power
$400
Answer
What are the units of Power?
SI
cgs
common
1 J/s = 1 Watt = 1 W
1 erg/s
1 ft*lb/s
1 W = 107 ergs/s =0.738 ft*lbs/s
1 hp = 745.7 Watts = 550 ft*lbs/s
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Conservation Laws
$100
Answer
What is an open system?
F  0, Energy can go in or out of the system.
What is a closed system?
F = 0, No energy can go in or out of the
system.
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Conservation Laws
$200
Answer
What is the Law of Conservation
of Linear Momentum?
p = 0
The momentum of the system before the collision is
the momentum of the system after the collision.
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Conservation Laws
$300
Answer
What is the Law of Conservation
of Angular Momentum?
L = 0
The angular momentum of the system before the
event is the angular momentum of the system after
the event.
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Conservation Laws
$400
Answer
What is the Law of Conservation
of Energy?
Work Applied Force = K.E. + P.E. + EINT
Energy can not be created or destroyed.
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Potpourri $100
Answer
At what frequency would you
put energy into a system?
At resonance.
The frequency at which the system naturally
vibrates.
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Potpourri $200
Answer
What is the impulse
momentum theorem?
J = Faveraget = p
This is used with an open system.
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Potpourri $300
Answer
Complete the table for linear/ angular conversions
Displacement
Velocity
Acceleration
Mass
Force
momentum
Linear
Angular
d
v
a
m
F
p


a
I

L
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Potpourri $400
Answer
What is torque?
Torque is force acting through a displacement
where force and displacement are
perpendicular.
Torque =  = Force * Displacement = Fd
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