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WorksheetsEnergy Review
Total questions: 62
Worksheet time: 59mins
Name
Class
Date
1.
Acceleration is the rate at which _____ changes with time.
a)
position
b)
distance
c)
velocity
d)
none of the above
2.
The metric unit for acceleration is ______.
a)
m
b)
m/s
c)
m/s2
d)
s
3.
A roller coasters accelerates from an initial velocity of 6.0 m/s to a final velocity of 70 m/s over 4 seconds. What's the acceleration?
a)
24 m/s2
b)
18 m/s2
c)
16 m/s2
d)
16 m/s
4.
Changes in our speed, direction or both are called _________.
a)
gravity
b)
changes
c)
acceleration
d)
deceleration
5.
If there are two forces going in the same direction how would you find the net force?
a)
Subtract
b)
Add
c)
Neither
d)
Multiply
6.
How do you know if and object has balanced force?
a)
It only has one force
b)
its moving
c)
It has equal forces on all sides
d)
its staying still
7.
Which of the following is a force?
a)
Inertia
b)
Friction
c)
Velocity
d)
Acceleration
8.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
9.
Which arrangement of two forces acting on an object will create the greatest net force?
a)
1
b)
2
c)
3
d)
4
10.
The momentum of an object depends upon the object's ___________&_____________.
a)
size and shape
b)
mass and speed
c)
mass and veloctiy
d)
mass and energy
11.
The equation to calculate momentum is
a)
p=mv
b)
p=1/2mv2
c)
p=mgh
d)
p=mg
12.
What does this graph represent?
a)
Constant speed
b)
Acceleration
c)
Not moving
13.
Velocity is
a)
speed
b)
direction
c)
speed with a direction
14.
LT4: The graph shows Ashley riding her bike to Maria's house.
What was occurring from point B to point C?
What was occurring from point B to point C?
a)
She was increasing her speed.
b)
She stopped for 4 minutes
c)
She was decreasing in speed
15.
A speedometer shows a "snapshot" or "freeze frame" of a car's motion. This is called
a)
instantaneous speed.
b)
average speed.
c)
velocity.
d)
displacement.
16.
Which quantity is a vector?
a)
Displacement
b)
Distance
17.
What is the energy of motion that depends on speed and mass?
a)
Potential Energy
b)
Kinetic Energy
c)
Chemical Energy
d)
Thermal Energy
18.
What is the energy of position or shape that depends on weight and height, also called stored energy?
a)
Potential Energy
b)
Kinetic Energy
c)
Chemical Energy
d)
Sound Energy
19.
What is energy?
a)
It is measured in watts
b)
It is the ability to do work
c)
It is power
d)
It is fluid motion
20.
Which coconut has the greatest gravitational potential energy?
a)
Position 1
b)
Position 2
c)
Position 3
d)
None of the above
21.
The diagram below shows a hot air balloon rising. Propane gas tanks are seen at the bottom of the balloon. What energy transformations occur when propane gas is used to lift the balloon?
a)
Mechanical to light to chemical
b)
Chemical to thermal to mechanical
c)
Chemical to mechanical to thermal
d)
Thermal to chemical to light
22.
What is happening at B?
a)
Lowest kinetic energy, highest potential energy
b)
Highest kinetic energy, lowest potential energy
23.
What is the energy transformation?
sun ----> apple tree
(think about what the plant needs for photosynthesis)
sun ----> apple tree
(think about what the plant needs for photosynthesis)
a)
chemical to solar
b)
solar to chemical
c)
heat to chemical
d)
chemical to mechanical
24.
A cheetah can run briefly with a speed of 31m/s. Suppose a cheetah with a mass of 47 kg runs at this speed. What is the cheetah’s kinetic energy?
a)
22583.5 J
b)
728.5 J
c)
1457 J
d)
0.75 J
25.
When a rubber band is stretched, it is demonstrating which type of potential energy?
a)
kinetic
b)
elastic potential
c)
gravitational potential
d)
mechanical
26.
The Law of Conservation of Energy states that__________
a)
The overall amount of energy remains the same but some energy is completely destroyed during energy transformations
b)
The overall amount of energy remains the same energy cannot be created or destroyed.
c)
The overall amount of energy can change depending on the energy conversions that take place.
d)
The overall amount of energy can change because sometimes energy is lost to the environment
27.
What energy is electrical energy?
a)
energy created by electrons
b)
puppy monkey baby
c)
protons
d)
dancing
28.
True or False, Electric energy is created by forcing electrons to travel from one atom to another?
a)
true
b)
false
c)
all the above
29.
Thermal energy always moves from ____________ objects to ______________ objects.
a)
cooler, warmer
b)
warmer, cooler
c)
faster, slower
d)
slower, faster
30.
If an object has particles that are moving very quickly, the object 's temperature is probably _____.
a)
cold
b)
slow
c)
big
d)
hot
31.
John leaves school to go home. He walks 6 blocks North and then 8 blocks west. How far is John from the school?
a)
14 blocks
b)
12 blocks
c)
10 blocks
d)
8.5 blocks
32.
David walks 3 km north, and then turns east and walks 4 km. What is the distance?
a)
7 km
b)
3 km
c)
4 km
d)
1 km
33.
1. Amy runs 2 miles south, then turns around and runs 3 miles north. What is displacement?
a)
5 miles
b)
1 miles
c)
2 miles
d)
3 miles
34.
What is the unit of force?
a)
Kilogram
b)
Meter
c)
Pascal
d)
Newton
35.
The force that opposes the motion of two surfaces sliding past each other is called ___________.
a)
acceleration
b)
inertia
c)
friction
d)
unbalanced
36.
What is the attraction between two objects because of their mass?
a)
Inertia
b)
Gravity
c)
Gravitational Force
d)
Weight
37.
Which has more mass, a kilogram of feathers or a kilogram of iron?
a)
feathers
b)
iron
c)
neither
38.
What types of charges repel?
a)
Positive and Positive
b)
Positive and Neutral
c)
Negative and Neutral
d)
Neutral and Neutral
39.
Walking across a carpet is an example of charge being transferred by
a)
friction.
b)
induction.
c)
contact.
d)
static electricity
40.
To demonstrate static electricity, a teacher takes an inflated balloon and rubs it against his hair. The rubber balloon picks up electrons from his hair, which makes his hair have
a)
a net negative charge
b)
a magnetic force
c)
a net positive charge
41.
A limitation or restriction is a
a)
Invention
b)
Innovation
c)
Criteria
d)
Constraint
42.
What is the first step of the Engineering Design Process?
a)
Research the problem
b)
Identify the problem
c)
Create a hypothesis
d)
Brainstorm solutions
43.
A change from one form of energy to another is called ___________.
a)
work
b)
power
c)
mechanical
d)
energy transformations
44.
What states that energy can never be created or destroyed?
a)
law of conservation of momentum
b)
law of conservation of energy
c)
law of conservation of matter
d)
law of conservation of water
45.
The momentum for any object is calculated by
a)
dividing mass by velocity.
b)
multiplying mass by velocity.
c)
multiplying mass by acceleration.
d)
dividing force by acceleration.
46.
A toy car of a mass of 3 kg moves along a frictionless railroad track with a velocity of 4 m/s. What is the momentum of the toy car?
a)
0.75 kg m/s
b)
0.75 N
c)
12 kg m/s
d)
12 N
47.
Which object has the greatest momentum?
a)
An 18-wheeler tractor trailer at rest.
b)
An average mass person walking.
c)
A sports car driving on the highway.
48.
An impulse is equivalent to
a)
the change in mass of an object.
b)
the change in volume of an object.
c)
a force applied to an object for a period of time.
d)
a force applied to an object for a period of time.
49.
Which statement best describes the law of conservation of momentum?
a)
Momentum does not change.
b)
The energy of a system is conserved.
c)
Force is proportional to acceleration.
d)
Total momentum of a system is conserved.
50.
The total momentum before the collision is less than the total momentum after the collision.
a)
True
b)
False
51.
What could you do to improve your egg safety device design?
a)
Reduce the impact time
b)
Extend the impact time
c)
Increase the amount of force the device hits the ground with
d)
Absolutely nothing. The egg was predestined to crash.
52.
A racing car has a mass of 1525 kg. What is it's kinetic energy if it has a speed of 108 km/hr?
a)
4.5 x 104 j
b)
6800 j
c)
6.86 x 105 j
d)
686 j
53.
1600 kg car travels at 12.5 m/s. What is it's kinetic energy?
a)
1250 j
b)
1.25 x 105 j
c)
250,000 j
d)
2.5 x 105 j
54.
Which 2 letters have the most kinetic energy
a)
W & Y
b)
X & Z
55.
Energy can be _____________ or changed from one type to another.
a)
destroyed
b)
transferred
c)
created
d)
ignored
56.
Can an object use up energy?
a)
Yes
b)
No
57.
can energy be changed
a)
yes
b)
no
58.
In solid conductors, electric current is the flow of
a)
water
b)
electrons
c)
protons
d)
neutrons
59.
Two like charges
a)
repel each other
b)
neutralize each other
c)
attract each other
d)
do what they want
60.
Magnetism is generated by moving
a)
protons.
b)
electrons.
c)
neutrons.
d)
elements.
61.
How were we able to turn the electromagnet off?
a)
Hooking the wire up to the battery/
b)
Moving the battery further away from metal objects
c)
Disconnecting the circuit to stop current flow
62.
Faraday demonstrated that an electric current can be created by...
a)
Having a magnet near by
b)
Moving a magnet near a wire
c)
Hooking a wire up to a battery
d)
Running a generator
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