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Energetics- Mechanical

Total questions: 138

Worksheet time: 3hrs 34mins

Name
Class
Date
1.
Which position has the most kinetic energy?
a)
A
b)
G
c)
D
d)
B
2.
Which position has the most potential energy?
a)
A
b)
G
c)
C
d)
D
3.
If an object moves from a high place to a lower place, will it gain or lose potential energy?
a)
lose
b)
gain
c)
neither
d)
both
4.
Potential energy is the energy of __________.
a)
motion
b)
sound
c)
rolling
d)
position
5.
Which is the BEST example of kinetic energy?
a)
a bird sitting on the edge of a cliff
b)
a sky diver jumping from a plane
c)
a dog sitting in his bed
6.
Energy that is in motion and is being used.
a)
kinetic energy
b)
potential energy
c)
thermal energy
7.
Stored energy that hasn't been used yet.
a)
kinetic energy
b)
potential energy
c)
thermal energy
8.
What energy is pulling an arrow back 
a)
kinetic energy
b)
potential energy
c)
energy
9.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
10.
Can energy be changed?
a)
yes
b)
no
11.
What is potential energy?
a)
The energy an object has due to its motion
b)
The stored energy of an object due to its position or condition.
c)
The energy an object might have if it existed 
d)
zombies coming
12.
What are the two types of Mechanical Energy? (ME)
a)
Kinetic and Potential Energy
b)
Kinetic and Nuclear Energy
c)
Potential and Chemical Energy
d)
Thermal and Kinetic Energy
13.
Kinetic Energy is defined as
a)
Energy stored due to its location
b)
Energy of motion
c)
Energy stored in the bonds of molecules
d)
Heat energy
14.
The equation to find kinetic energy is
a)
KE=1/2mv2
b)
KE=mgh
c)
KE=1/2kx2
d)
KE=Fd
15.
Which of the following objects has the most kinetic energy?
a)
A 20 kg toddler running at 5 m/s
b)
A 50 kg toddler running at  30 m/s
c)
A 90 kg toddler running at 30 m/s
d)
A 100 kg  toddler running at 2 m/s
16.
gravitational potential energy is defined as
a)
the energy an object has due to its height above the ground
b)
the energy an object has due to its motion
c)
the energy a spring has due to its stretch
d)
the chemical energy stored in the molecules of atoms
17.
the equation for gravitational potential energy is 
a)
PEg = mgh
b)
PEg= 1/2kx2
c)
PEg= Fd
d)
PEg = 1/2mv2
18.
A 5 kg ball is lifted 12 m above the ground. It's gravitational potential energy is
a)
60 J
b)
600 J
c)
17 J
d)
2.4 J
19.
You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what type of energy does it have?
a)
Potential Energy
b)
Kinetic Energy
c)
Nuclear Energy
d)
Chemical Energy
20.
You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, how much kinetic energy does it have?
a)
10 J
b)
100 J
c)
7 J
d)
20 J
21.
You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what is the ball's velocity?
a)
6.32 m/s
b)
40 m/s
c)
4.47 m/s
d)
100 m/s
22.
A 2 kg ball has an initial velocity of 6 m/s. How high up the ramp will it go?
a)
1.8 m
b)
10 m
c)
6 m
d)
12 m
23.
What kind of energy is in a rock at the edge of a cliff?
a)
Potential
b)
Kinetic
24.
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 
25.
__________ is stored energy. 
a)
Potential
b)
Kinetic
c)
None of the above 
d)
All of the above 
26.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
27.
What kind of energy is in a moving skateboard?
a)
Potential
b)
Kinetic
28.
What kind of energy is in a person climbing a ladder?
a)
Potential
b)
Kinetic
c)
Both
29.
What kind of energy is in a waving hand?
a)
Potential
b)
Kinetic
30.
What kind of energy is in a stretched rubber band?
a)
Potential
b)
Kinetic
31.
Energy can not be created or destroyed, only converted from one form to another.
a)
true
b)
false
32.
Energy is the ability to do _____________ or cause change.
a)
work
b)
rest
c)
experiments
d)
science
33.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
34.
A roller coaster has a mass of 250 kg, and is 50 meters above the ground, what is the potential energy?
a)
122,625 Joules
b)
5,600 Joules
c)
234,799 Joules
35.
When a pendulum swings, at which point is potential energy at its greatest
a)
1
b)
2
c)
3
d)
4
36.

How much KE is present at 100 m?

a)

15,000 J

b)

20,000 J

c)

35,000 J

d)

50,000 J

e)

0 J

37.

Using this Picture for all of the next questions, please answer the following. How much GPE is present at 100 m?

a)

15,000 J

b)

20,000 J

c)

35,000 J

d)

50,000 J

e)

0 J

38.

How much ME is present at 100 m?

a)

15,000 J

b)

20,000 J

c)

35,000 J

d)

50,000 J

e)

0 J

39.

How much KE is present at 30 m?

a)

15,000 J

b)

20,000 J

c)

35,000 J

d)

50,000 J

e)

0 J

40.

How much GPE is present at 30 m?

a)

15,000 J

b)

20,000 J

c)

35,000 J

d)

50,000 J

e)

0 J

41.

How much ME is present at 30 m?

a)

15,000 J

b)

20,000 J

c)

35,000 J

d)

50,000 J

e)

0 J

42.

How much GPE is present at 60 m?

a)

15,000 J

b)

20,000 J

c)

30,000 J

d)

50,000 J

e)

0 J

43.

How much KE is present at 60 m?

a)

15,000 J

b)

20,000 J

c)

30,000 J

d)

50,000 J

e)

0 J

44.

How much ME is present at 60 m?

a)

15,000 J

b)

20,000 J

c)

30,000 J

d)

50,000 J

e)

0 J

45.

What do you notice about the ME throughout the whole ski jump?

a)

It is the same as the GPE

b)

It is the same as the KE

c)

It is always different

d)

It never changes

46.

Using the GPE, calculate the mass of the skier.

a)

about 500 kg

b)

about 51 kg

c)

about 1167 kg

d)

about 119 kg

47.

Now that you know the mass of the skier, calculate the speed of the skier as they reach the bottom of the hill

a)

about 1373 m/s

b)

about 140 m/s

c)

about 37 m/s

d)

about 12 m/s

48.
A 70 kg runner has a velocity of 5 m/s. Her kinetic energy is
a)
875 J
b)
175 J
c)
1750 J
d)
350 J
49.
Lamar Gant, U.S. powerlifting star, became the first man to deadlift five times his own body weight in 1985. Deadlifting involves raising a loaded barbell from the floor to a position above the head with outstretched arms. Determine the work done by Lamar in deadlifting 300 kg to a height of 0.90 m above the ground (W=Fd).
a)
270 J
b)
2646 J
c)
333 J
d)
3.00X10-3 J
50.

Tamara rides her skateboard 15 meters up a ramp to a height of 5 meters above ground. What is the ideal mechanical advantage of the ramp?

a)

0.5m

b)

1.5m

c)

3

d)

3m

51.
A ball of clay is thrown at a wall at a velocity of 28.0 m/s.  After it hits the wall, it takes 0.020 s to stop.  What is the acceleration of the clay when it hits the wall?
a)
1400 m/s2
b)
-1400 m/s2
c)
0.56 m/s2
d)
-0.56 m/s2
52.
Force = Mass x Acceleration
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
Newton's 4th Law
53.
What is energy?
a)
the ability to do work
b)
mass and volume
54.
What is the energy of motion?
a)
radiant
b)
kinetic
c)
gravitational
d)
potential
55.
Which is an example of potential energy?
a)
A car sitting at the top of a hill
b)
A kite flying in the air
c)
A fox chasing a mouse
d)
A bowling ball rolling
56.
Wind turbines and windmills convert what energy to another?
a)
Kinetic to electric
b)
Gravitational potential to electric
c)
Mechanical to potential
d)
Thermal to sound
57.
Work is:
a)
A transfer of energy by a force to move and object
b)
Something you get paid for
c)
Something you take home
d)
Makes you sweat
58.
Energy is measured using which unit?
a)
Grams
b)
Meters
c)
Watts
d)
Joules
59.

What is work?

a)

The pivot point allowing a lever to move

b)

A push or a pull

c)

A force that makes an object move

d)

Measurement of weight

60.

What is energy?

a)

The pivot point allowing a lever to move

b)

A push or a pull

c)

Measurement of weight

d)

The ability to move or allow something to move

61.

What is an example of potential energy?

a)

A book sitting on a shelf

b)

A car moving down the highway

c)

A person playing basketball

d)

Both B and C

62.

What is an example of kinetic energy?

a)

Water moving down a waterfall

b)

A car parked in a driveway

c)

A baby waving its hands

d)

Both A and C

63.

How does an inclined plane reduce the force needed to do work?

a)

By using a spring scale whenever you use an inclined plane

b)

By decreasing the length of the ramp

c)

By only allowing objects to move downwards

d)

By increasing the length of the ramp

64.

50 J of work is done lifting a 2.0 kg book in the air. How high was it lifted?

a)

2.6 m

b)

3.6 m

c)

1.0 m

d)

25 m

65.

When doing a chin-up, a student lifts her 42 kg body a Distance of 0.25 meters in 2 seconds. What is the Power delivered by the students biceps?

a)

6.25

b)

62.5

c)

52.5

d)

5.25

66.
How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?
a)
15 J
b)
45 J
c)
0 J
d)
5 J
67.
Another SI unit for a joule is 
a)
m/sec
b)
N-m
c)
meter
68.

A 1000N force pulls a car for 300m to the left. What is the work done by the truck?

a)

-300,000 J

b)

-150,000 J

c)

0 J

d)

150,000 J

69.

The moon orbits Earth with a circumference of 2.4 * 109m, a constant speed of about 1,000 m/s, and a gravitational attraction of 2*1020 N. What is the work done on the moon by the Earth?

a)

0 J

b)

2.4 * 106 J

c)

2*1023 J

d)

4.8*1029 J

70.

Bob (80 kg) uses 180 N of force to get him up the slope. The vertical distance is 2 m and the diagonal is 10 m. Calculate the work he does.

a)

1600 J

b)

160 J

c)

3600 J

d)

1800 J

71.
In which of the following situations do your arms do work on books?
a)
holding a heavy stack of books while standing
b)
carrying a heavy stack of books
c)
dropping a stack of books onto a table
d)
picking up a pile of books from the floor
72.
How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?
a)
15 J
b)
45 J
c)
0 J
d)
5 J
73.

Select all: Work is equal to...

a)

KE + PE

b)

Change in energy

c)

mg

d)

Fd

74.
The unit used to measure work is the 
a)
Watt
b)
Newton
c)
Joule
d)
meter
75.
What unit do we use for measuring power?
a)
Watts 
b)
Joules 
c)
Newtons 
d)
ft/lbs
76.
What is the difference between calculating power and work?
a)
Power takes into account the time it takes to complete a task
b)
Work takes into account the time it takes to complete a task
c)
Power is force/area
d)
Work is force/area
77.
__________ is stored energy. 
a)
Potential
b)
Kinetic
c)
None of the above 
d)
All of the above 
78.
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 
79.
Energy is the ability to do  ___________.
a)
Nothing
b)
Work
c)
Energy
d)
Change
80.
Which type of energy increases when you compress a spring?
a)
elastic potential energy
b)
kinetic energy
c)
radiant energy
d)
sound energy
81.
What is the correct equation for calculating elastic potential energy? 
a)
Elastic Potential Energy = Spring Constant x extension 2
b)
Elastic Potential Energy = ½ x Spring Constant x extension 2
c)
Elastic Potential Energy = ½ x Spring Constant x extension
d)
Elastic Potential Energy = ½ x Spring Constant / extension 2
82.
Find the Kinetic Energy of a 20 kg mass moving at a speed of 2 m/s
a)
40 J
b)
40 m/s
c)
40 kg
d)
50 J
83.
At which point is gravitational potential energy greatest
a)
W
b)
X
c)
Y
d)
Z
84.
The Potential Energy of a 20-kg mass at a height of 2 meters above the ground is
a)
392 J
b)
390 J
c)
400 J
d)
410 J
85.
Energy is the ability to do  ___________.
a)
Nothing
b)
Work
c)
Energy
d)
Change
86.
Which skier will have a greater potential energy? 
a)
Skier 1
b)
Skier 2
87.
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
88.
The energy of movement is...? 
a)
Kinetic
b)
Potential
89.
You increase your speed from 3 m/s to 9 m/s, by what factor does your kinetic energy increase?
a)
3x
b)
6x
c)
9x
d)
it doesn't increase
90.
If W=Fd
Then how much work is done if it takes 20N to move a box 10 meters
a)
0
b)
2
c)
20
d)
200
91.
At which point is kinetic energy greatest 
a)
W
b)
X
c)
Y
d)
Z
92.
An escalator pushes a student with 490 N of force a distance of 5 m in 10 s. What is the power?
a)
4.9 Watts
b)
2450 Watts
c)
490 Watts
d)
245 Watts
93.
A 40 kg crate is picked up by a crane to a height of 50m. The crate falls. What is the velocity of the crate just before it hits the ground?
a)
2000 Joules
b)
19,600 Joules
c)
19,600 m/s
d)
31.3 m/s
94.
Two identical objects need to get to the second floor of a building. One is lifted by rope, the other carried up the stairs. The object that went the farther distance had more work done.
a)
True
b)
False
95.
An object experiences 10 J of work. If a force of 2 N is applied to it, what is the distance the object has gone?
a)
5 m
b)
5 m/sec
c)
5 N
d)
5 J
96.
A person weighing 600 N gets on an elevator. The elevator lifts the person 6 m in 10 seconds.  How much power was used?
a)
360 W 
b)
60 W
c)
3600 W
d)
600 W
97.

4+4-2-6+9

a)

7

b)

2

c)

9

d)

-3

98.

Which of the following is the S.I. unit for Power?

a)

Watts

b)

Joules

c)

Newtons

99.

It takes 9 seconds to move an object 3 meters using a force of 6 Newtons. What's the power?

a)

81 W

b)

2 W

c)

4 W

100.
What is the equation for work?
a)
W = mass * acceleration
b)
W = force * distance
c)
W = force/distance
d)
W = speed/time
101.
The unit used to measure Work is the 
a)
Watt
b)
Newton
c)
Joule
d)
Meter
102.

How do you calculate power?

a)

P = w / t

b)

P = f * t

c)

P = w * t

103.

Which term describes the amount of work done divided by the time interval?

a)

Work

b)

Power

c)

Force

104.
The amount of work done in a certain amount of time is known as 
a)
work
b)
effort force
c)
resistance force 
d)
power
105.

Having the same amount of work done means you will have the same amount of Power

a)

True

b)

False

106.

If you increase your work and decrease your time, you will have

a)

more power

b)

less power

c)

same amount of power

d)

power rating can not be determined

107.
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
108.
Which value and symbol are incorrectly paired?
a)
work and joules
b)
force and newton
c)
power and watt
d)
potential energy and watt
109.
If a lion drags his prey 10 meters to his den doing 500 joules of work, how much force did he use?
a)
50 Newtons
b)
500 Joules
c)
50,000 Newtons
d)
10 Newtons
110.

The equation for percent efficiency is equal to

a)

work input / work output x 100

b)

work output / work input x 100

c)

mass x acceleration

d)

work / time

111.

It took 50 joules to push a chair 5 meters across the floor. With what force was the chair pushed?

a)

250 N

b)

10 J

c)

10 N

d)

250 J

112.
if you push a cart with a force of 60 N for 2 m... how much work have you done
a)
120 J
b)
30 J
c)
120 N 
d)
30 N
113.
What is the equation for power?
a)
P = Work/time
b)
P = Force/time
c)
P = time/distance
d)
P = Work * time
114.
How much work is produced when 350 N is used to move a car 5 m?
a)
70 J
b)
1750 J
c)
355 J
d)
175 J
115.

What is the power of a kitchen blender if it can perform 3,750 joules of work in 15 seconds?

a)

56250 W

b)

56 kW

c)

4 W

d)

250 W

116.

How much work is done using a 500-watt microwave oven for 5 minutes.

a)

250 J

b)

15000 J

c)

2500 J

d)

100 J

117.

How much work is done using a 60-watt light bulb for 1 hour?

a)

3600 J

b)

216 kJ

c)

60 J

d)

1 kJ

118.
The roller coaster is a perfect example of which type or types of energy?
a)
Kinetic 
b)
Potential
c)
Both
119.
At the top of a loop there is more of this type of energy?
a)
Potential
b)
Kinetic
120.
At the end of a loop on a roller coaster there is less of this type of energy?
a)
Potential
b)
Kinetic
121.
Potential energy is dependent upon the mass of the object and the height of the object. 
a)
True
b)
False
122.

At an amusement park, a group of riders

boarded a roller coaster train and sat down.

Once everyone was safely in their seats,

the ride operator flipped a switch, and

electricity flowed to a motor below the track.

The motor pulled the train forward

and out of the station.

The motor was used to convert _____ into ______

a)

electrical energy...kinetic energy

b)

kinetic energy...electrical energy

123.

During an energy transformation, the total amount of energy stays the same. So, when one type of energy decreases, at least one other type of energy will increase.


Read the passage about the next part of the ride. Think about how kinetic energy and gravitational potential energy changed. Keep in mind that increasing the distance between an object and Earth increases the gravitational potential energy stored between them.


As the train rushed down the hill the kinetic energy of the train _____and the Gravitational potential Energy stored between the train and Earth _________

a)

stayed the same;decreased

b)

increased;decreased

c)

decreased;increased

d)

increased;increased

124.

Next, the roller coaster train went through

several turns and sped toward a shorter hill.

As the train rolled up the hill, it slowed down.

The train went over the top of the hill and

then sped up again as it raced down the

other side of the hill.

As the train went up the hill, _____ was converted into ____

As the train went down the hill _____ was converted into_____

a)

kinetic energy...gravitational potential energy; kinetic energy...gravitational potential energy

b)

gravitational potential energy...kinetic energy; kinetic energy...gravitational potential energy

c)

kinetic energy..gravitational potential energy; gravitational potential energy...kinetic energy

d)

gravitational potential energy...kinetic energy; gravitational potential energy...kinetic energy

125.

The roller coaster train went through

a final big turn and then headed back

toward the station.

The train slowed down as brakes on

the track squealed and heated up.

Once the train came to a stop in the

station, the riders stood up and left.


Match each claim with the evidence that supports it.

Claim 1: Kinetic Energy Decreased

Claim 2: Thermal Energy Increased

Claim 3: Sound Energy Increased

a)

1 The train slowed down. 2 The brakes squealed. 3 The brakes heated up

b)

1 The train slowed down.2 The brakes heated up 3 The brakes squealed.

c)

1.The brakes heated up 2.The train slowed down. 3. The brakes squealed.

d)

1 The brakes squealed. 2 The brakes heated up 3 The train slowed down.

126.

In all energy transformations, the types of energy that decrease are converted into the types of energy that increase.

The train slowed down as brakes on the track

squealed and heated up. Once the train came to

a stop in the station, the riders stood up and left.

While the train was braking _____, was converted into ___ and _____

a)

thermal energy; sound energy; kinetic energy

b)

kinetic energy; sound energy;thermal energy

c)

sound energy; kinetic energy; thermal energy;

127.

Based on what you learned about the roller coaster ride, which of the following statements about energy transformations are true? Select all that apply.

a)

Kinetic Energy can be converted into several other types of energy

b)

A change in an objects speed is evidence that the object's kinetic energy is changing

c)

Only gravitational kinetic energy can be converted into kinetic energy

128.
 The two most important forms for amusement park rides are kinetic and potential _____
a)
acceleration
b)
Friction
c)
force
d)
energy
129.
is the energy possessed by an object because of its motion.
a)
Power
b)
Force 
c)
energy
d)
kinetic energy
130.
What force caused your cart to slow down?
a)
friction
b)
applying force
c)
gravity
d)
gravity and friction
131.
What is the relationship between kinetic energy and speed
a)
They are directly proportional
b)
There is no relationship
c)
They are indirectly proportional
d)
They are brother and sister
132.
Which would have the greatest potential energy with respect to work being done on the book?
a)
A book on a 1.2 meter table with a normal force
b)
A book on the floor with a normal force
c)
book in the hands of a 1.8 meter person with a normal force 
d)
They have the same potential energy
133.
Where does the most potential energy exist on a roller coaster?
a)
The top of the coaster
b)
The bottom of the coaster
c)
The middle of the coaster
d)
It is the same anywhere on the coaster
134.
Jose is stretching a rubber band so that it is tight.  Before he lets the rubber band fly, the rubber band has:
a)
Magnetic Energy
b)
Kinetic Energy
c)
Potential Energy
d)
None of these types of Energy
135.
Velocity is:
a)
Distance with direction
b)
Time with direction
c)
Speed with direction
d)
None of these
136.
An object set in motion by a force is an example of:
a)
an unbalanced force
b)
a balanced force
c)
neither of these
d)
both of these
137.
The combination of all the forces acting on an object is an example of:
a)
Acceleration
b)
Gravity
c)
Net Force
d)
Mass
138.
When you are at the top of a hill on a roller coaster you have what type of energy?
a)
Kinetic Energy 
b)
Potential Energy
c)
Electrical Energy
d)
Chemical Energy 

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