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Energy Ch. 3 Review

Total questions: 90

Worksheet time: 2hrs 8mins

Name
Class
Date
1.
Power is defined as the
a)
force on an object times the distance the object moves.
b)
force on an object divided by the time the force acts.
c)
work done times the time taken to do that work.
d)
work done on an object divided by the time to do the work
2.
If the Total Mechanical Energy is 50J, Potential Energy is 40 J, what is the Kinetic Energy?
a)
1 J
b)
10 J
c)
90 J
3.
At which point(s) on the roller coaster is the gravitational potential energy at its maximum?
a)
A
b)
B
c)
C
d)
D
4.
What kind of energy does an object possess when it's resting on top of the hill?
a)
Potential Energy
b)
None
c)
Kinetic Energy
d)
All
5.
If 150 Joules of work is needed to move a box 10 meters, what force was used? 
a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
6.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
7.
Which situation is work not done?
a)
lifting a 20 pound box off the floor
b)
holding a 20 pound box above the floor
c)
sliding a 20 pound box across the floor
d)
sliding a 20 pound box up an inclined plane
8.
Which of the following does a simple machine do?
a)
reduce the amount of work needed to do work
b)
reduce the amount of force needed to do work
c)
Both of the above
9.
Force X Distance = _______?
a)
Work
b)
Power
c)
Energy
d)
Force
10.
A _____ is a fixed bar  that us free to move around a fixed point known as a fulcrum.
a)
pulley
b)
inclined plane
c)
lever
11.
What type of simple machine is found on the cap of a pickle jar?
a)
lever
b)
inclined plane
c)
pulley
d)
screw
12.
Which of these is an example of a wedge?
a)
skateboard
b)
broom
c)
stairs
d)
butter knife
13.
Consists of two circular objects; a central shaft and a wheel.
a)
wheel and axle
b)
screw
c)
pulley
14.
Calculate the amount of work done if you use a 100N force to push a 50 kg box 5 m across the kitchen floor. 
a)
250 J 
b)
500 J
c)
5000 J
d)
50,000 J
15.
Jeff is a landscaping contractor and lifts a rock weighing 600 pounds by wedging a board under the rock. Jeff weighs 150 pounds and puts all of his weight on the lever. How much mechanical advantage did the lever provide to Jeff in lifting the rock?
a)
0
b)
2
c)
4
d)
8
16.
A 16 N force is applied to an object and 96 J of work is done. How far was the object moved?
a)
6 m
b)
16 m 
c)
80 m 
d)
1536 m 
17.
Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?
a)
1
b)
10
c)
100
d)
1000
18.
A watt is defined as ___________
a)
One joule per second
b)
One horsepower per second
c)
A force of one pound over a distance of one foot
d)
A force of one newton over a distance of one meter
19.
A slanted surface used to raise an object is a(n) ____. 
a)
screw
b)
effort ramp 
c)
inclined plane 
d)
efficiency board 
20.
The rate at which work is done is called ____. 
a)
effort time
b)
efficiency
c)
 force
d)
power
21.
The amount by which a machine multiplies an effort force is called the ____. 
a)
efficiency factor
b)
 fulcrum
c)
mechanical advantage
d)
 resistance force
22.
An inclined plane with one or two sloping sides forms a machine called a ____. 
a)
pulley 
b)
ramp
c)
lever
d)
wedge
23.
When two or more simple machines work together, they are called a(n)____.
a)
compound machine
b)
screw 
c)
simple machine
d)
effort machine
24.
Power is a measure of how much ______ can be done in a set amount of ______.
a)
Work, Time
b)
Work, Energy
c)
Energy, Force
d)
Force, Work
25.
Efficiency is a ______ of what you put in versus what you get out of a system.
a)
source
b)
ratio
c)
multiplication
d)
addition
26.
An object has a weight of 200 N and is moved 3 meters.  How much work is done?
a)
66.7 J
b)
600 J
c)
203 J
d)
0.015 J
27.
A light bulb consumes 100 Watts.  If it is left on for 20 seconds, how much work does it do?
a)
5 J
b)
2,000 J
c)
0.2 J
d)
100 J
28.
Flash is the most powerful hero because...
a)
He can do the most in the least amount of time.
b)
He can do the most.
c)
He can move the fastest.
d)
He isn't.
29.
Efficiency is....
a)
measured in Joules.
b)
a percentage.
c)
measured in Watts.
d)
measured in Newtons.
30.
For there to be work, there must always be distance.
a)
True
b)
False
31.
Power does not depend on...
a)
strength
b)
work
c)
time
d)
any of these
32.

The equation for work is

a)

work = power x mass

b)

work = power / time

c)

work = force x distance

d)

work = distance x time

33.

The equation for POWER is

a)

power = mass x time

b)

power = work / time

c)

power = time / work

d)

power = work x time

34.

The equation for POTENTIAL ENERGY is

a)

PE = mass x gravity x height

b)

PE = gravity x weight

c)

PE = height / work

d)

PE = work / time

35.

The equation for KINETIC ENERGY is

a)

KE = mass x gravity

b)

KE = 1/2 height x speed

c)

KE = mass2

d)

KE = 1/2 mass x speed2

36.

______________ energy is due to the position of something or the movement of something.

a)

Kinetic

b)

Potential

c)

Mechanical

d)

Work

37.

Energy that is stored and held in readiness

a)

Kinetic

b)

Mechanical

c)

Work

d)

Potential

38.

Kinetic energy is the energy of ___________.

a)

Distance

b)

Motion

c)

Work

d)

Roman

39.

Energy cannot be ________ or ___________.

a)

big/small

b)

left/right

c)

created/destroyed

d)

made/transferred

40.

Energy can be transformed from one form into another, but the total amount of energy never changes.

a)

Work-energy theorem

b)

Law of conservation of energy

c)

Newton's second law of motion

d)

King's theorem of energy

41.

This type of energy has a relationship with heat

a)

Electric potential energy

b)

Electric energy

c)

Thermal energy

d)

Vibrational energy

42.

Light, x-rays, and microwaves are all examples of....

a)

Thermal energy

b)

Chemical potential energy

c)

Potential energy

d)

Radiant energy

43.
How do you calculate power?
a)
P = W/t
b)
P = E/t
c)
P = w * t
d)
P = bbq/chicken
44.
How do we calculate work?
a)
W = F * d
b)
w = f * D
c)
W = F * D
d)
w = f * d
45.
How much work is being done with 200 N of force over 426 meters?
a)
85,200 J
b)
45,620 J
c)
90,480 J
d)
62,329 J
46.
What is the formula for Kinetic Energy?
a)
PE = m*g*h
b)
KE = 1/2m*v2
c)
W = F*d
d)
P = W/t
47.
If 68 Joules were necessary to move a 4 Newton crate, how far was the crate moved?
a)
272 m
b)
17 m
c)
4.05 m
d)
272 cm 
48.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
49.
Gravitational potential energy depends on the ________ and ________ of the object. 
a)
Height and mass
b)
Friction and movement
c)
Mass and Movement
d)
Height and Friction 
50.
What is the formula for calculating the total amount of mechanical energy?
a)
ME = KE + PE
b)
KE = ME + PE
c)
PE = KE + ME
d)
ME = 1/2 mv2
51.
The potential energy stored in chemical bonds.
a)
mechanical energy
b)
thermal energy
c)
electrical energy
d)
chemical energy
52.
Kinetic or potential energy associated with the motion or position of an object.
a)
thermal energy
b)
kinetic energy
c)
mechanical energy
d)
potential energy
53.
The energy of electric charges.
a)
electrical energy
b)
elastic potential energy
c)
kinetic energy
d)
gravitational potential energy
54.
The potential energy stored in the nucleus of an atom.
a)
electrical energy
b)
thermal energy
c)
nuclear energy
d)
kinetic energy
55.
The process of changing one form of energy to another.
a)
transform
b)
energy
c)
energy transormation
d)
law of conservation of energy
56.
A material such as coal that forms over millions of years from the remains of ancient plants and animals; burned to release chemical energy.
a)
fossil
b)
fossil fuel
c)
matter
d)
combustion
57.
An example of where or how Chemical energy comes from
a)
Car using gas
b)
Fan
c)
Sun
d)
Hammer
58.
An example of where or how Electrical energy comes from
a)
Car using gas
b)
Coffee pot
c)
Sun
d)
Your body
59.
An example of where or how Radiant energy comes from
a)
Car using gas
b)
Fan
c)
Sun
d)
Hammer
60.
An example of where or how Mechanical energy comes from
a)
Pulley
b)
Household appliances
c)
Sun
d)
Your body
61.
Energy transformations: When you move your leg, your body changes chemical energy supplied by food into ______ energy
a)
Electrical 
b)
Mechanical
c)
Kinetic
d)
Heat
62.
Energy transformations: Energy transformation of a fan changes electrical energy to mechanical energy and also to ____ energy to ____ energy
a)
Mechanical & Electrical
b)
Kinetic & Potential
c)
Heat & Kinetic
d)
Mechanical & Kinetic
63.
Energy transformations: A stove changes electrical to ________ energy
a)
Kinetic
b)
Mechanical
c)
Heat
d)
Potential
64.
Energy transformations: A generator changes mechanical to ____ energy
a)
Potential
b)
Kinetic
c)
Heat
d)
Electrical
65.
A device that changes the amount of force exerted, the distance over which a force is exerted, or the direction in which force is exerted
a)
Compound Machine
b)
Law of Conservation of Energy
c)
Machine
d)
Simple Michine
66.
The fixed point around which a lever pivots
a)
Fulcrum
b)
Lever
c)
Pulley
d)
Screw
67.
The rate at which work is done
a)
Work
b)
Power
c)
Efficency
d)
Energy
68.
Stored energy due to chemical bonds
a)
Elastic Potential Energy
b)
Potential Energy
c)
Chemical Potential Energy
d)
Mechanical Advantage
69.
Formula for Power (remember it has 2)
a)
P = W/t
b)
P = t/W
c)
P = f*d
d)
P = E/p
70.
Formula for Efficiency
a)
e = Win/Wout * 100
b)
e = Wout/Win * 1000
c)
e = Wout/Win * 100
d)
e = W/t * 100
71.
Formula for Mechanical Advantage
a)
MA = Fout/Fin
b)
MA = Fin/Fout
c)
MA - Fout/e
d)
MA = Fin/e
72.

What energy transformation occurs as bioluminescent algae glow in the ocean?

a)

Radiant --> Chemical

b)

Thermal --> Radiant

c)

Chemical --> Radiant

d)

Thermal --> Chemical

73.

What energy transformation occurs in the chameleon as it quickly launches its tongue to catch an insect?

a)

Radiant --> Chemical

b)

Thermal --> Chemical

c)

Chemical --> Mechanical

d)

Mechanical --> Chemical

74.

What energy transformation occurs as howler monkeys loudly call to each other in the forest?

a)

Chemical --> Mechanical --> Sound

b)

Chemical --> Sound --> Thermal

c)

Sound --> Chemical --> Radiant

d)

Mechanical --> Chemical --> Sound

75.

What energy transformation occurs as as an elephant walks through the savanna?

a)

Thermal --> Chemical + Mechanical

b)

Mechanical --> Chemical + Thermal

c)

Radiant --> Chemical + Mechanical

d)

Chemical --> Mechanical + Thermal

76.

What energy transformation occurs during photosynthesis?

a)

Chemical --> Radiant

b)

Thermal --> Chemical

c)

Radiant --> Chemical

d)

Mechanical --> Thermal

77.

What energy transformation occurs as a mouse produces body heat?

a)

Chemical --> Thermal

b)

Thermal --> Chemical

c)

Electrical --> Thermal

d)

Thermal --> Mechanical

78.

What energy transformation occurs as an electric eel shocks its prey?

a)

Electrical --> Mechanical

b)

Thermal --> Electrical

c)

Chemical --> Electrical

d)

Radiant --> Electrical

79.
What is produced during ALL energy transformations?
a)
Sound Energy
b)
Mechanical Energy
c)
Thermal Energy
d)
Chemical Energy
80.
Water high in the air falls due to gravity, the moving water spins turbines, and they create/store electricity...
Pick the BEST Energy Conversion below for a Hydroelectric Dam.
a)
Mechanical to Electrical
b)
Electrical to Mechanical to Thermal
c)
Potential to Kinetic to Electrical
d)
Kinetic to Mechanical to Electrical
81.

Which form of energy would most likely be affected by change in weather

a)

geothermal

b)

natural gas

c)

wind

d)

nuclear

82.

What type of by-products does nuclear energy produce? (a disadvantage)

a)

carbon dioxide

b)

radioactive waste

c)

sulfur dioxide

d)

nitrogen oxide

83.

Which statement is true about the advantages and disadvantages of using different types of energy sources?

a)

wind power is an expensive, nonrenewable energy source

b)

solar power is a clean, renewable source of energy, but quite expensive

c)

nuclear power is very cost effective, nonrenewable, and leaves behind no radioactive waste

d)

coal is a safe and effective, renewable energy source

84.

Which is a disadvantage of solar power?

a)

solar power is unclean

b)

reduces the need for fossil fuels

c)

can only be collected when the sun is shining

d)

in nonrenewable

85.

Two friends decide to go to the park and watch a movie on a computer. The computer runs on battery power. What energy transformation is occurring from the battery to the light being given off by the computer?

a)

chemical - light - sound

b)

mechanical - chemical - electrical

c)

mechanical - electrical - light

d)

chemical - electrical - light

86.

What type of energy is stored in batteries or food?

a)

Potential energy

b)

Thermal energy

c)

Chemical energy

d)

Mechanical energy

87.

Energy that transfers heat is?

a)

Thermal energy

b)

Potential energy

c)

Mechanical energy

d)

Kinetic energy

88.

Which of the following best describes the energy transformations that occur when a flashlight that runs on batteries is turned on?

a)

chemical to mechanical to electrical to radiant

b)

radiant to electrical to sound

c)

chemical to radiant to mechanical to electrical

d)

electric to radiant to chemical

89.
In energy transformations, "wasted energy" usually takes what form?
a)
heat
b)
chemical energy
c)
light
d)
sound waves
90.
On a roller coaster, where is maximum kinetic energy?
a)
At the bottom of a big hill
b)
When going around a corner
c)
When going upside down
d)
At the top of a big hill

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