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Mid Term review

Total questions: 176

Worksheet time: 15hrs 26mins

Name
Class
Date
1.

The fixed point that a lever moves around is called a

a)

load

b)

resistance

c)

bar

d)

fulcrum

2.

A flat supporting surface tilted at an angle, with one end higher than the other, used as an aid to raise and lower a load.

a)

Simple Machine

b)

Inclined Plane

c)

Rise

d)

Mechanical Advantage

3.

Power is measured in

a)

m/s2

b)

Joules

c)

watts

d)

F

4.
Which of the following is a compound machine?
a)
hammer
b)
screw
c)
pry bar
d)
scissors
5.
___________ is done when force is applied to an object and the object moves in the same direction as the force
a)
power
b)
machine
c)
modified lever
d)
work
6.

What is the unit for work?

a)

Watts

b)

Kilograms

c)

Joules

d)

Newtons

7.

Energy is the ability to cause change or do work.

a)

True

b)

False

8.

You do work ONLY when you exert a force on an object and it moves in that direction.

a)

true

b)

false

9.
work transfers
a)
sweat
b)
energy
c)
velocity
d)
effort
10.

Which of the following is the best example of work being done?

a)

reading one page of a book

b)

lifting a box up from the floor

c)

pushing against a wall

d)

holding a box while standing

11.

_______________ is done when a force acts on an object and the object moves in the direction of the force.

a)

Work

b)

Kinetic energy

c)

Watt

d)

Joule

12.

The unit for work (aka Newton-meter)

a)

Watt

b)

Power

c)

Work

d)

Joule

13.

________________ is the rate at which work is done.

a)

Power

b)

Work

c)

Time

d)

Energy

14.

Energy that is stored and held in readiness

a)

Kinetic

b)

Mechanical

c)

Work

d)

Potential

15.

Kinetic energy is the energy of ___________.

a)

Distance

b)

Motion

c)

Work

d)

Roman

16.

Energy cannot be ________ or ___________ (in normal reactions)

a)

big/small

b)

left/right

c)

created/destroyed

d)

made/transferred

17.

What is an example of work being done?

a)

throwing a ball

b)

standing there holding a ball

c)

looking at a ball

d)

paying for a ball on Amazon

18.
An inclined plane wrapped around a rod forms this simple machine 
a)
lever
b)
pulley
c)
screw
d)
wedge 
19.

The head of an axe is an example of a

a)

pulley

b)

inclined plane

c)

screw

d)

wedge

20.
A seesaw is an example of a  
a)
wedge
b)
lever 
c)
inclined plane 
d)
pulley 
21.

A device that uses two or more simple machines working together to do more complex tasks

a)

fulcrum

b)

pulley

c)

compound (complex) machine

d)

motor

22.
Stairs
a)
wedge
b)
pulley
c)
inclined plane
d)
wheel and axle
23.

Lightbulb base

a)

wedge

b)

pulley

c)

incline plane

d)

screw

24.
Which is not a type of simple machine?
a)
spring
b)
screw
c)
pulley
d)
wedge
25.
The device used to raise a flag up a flag pole is an example of a 
a)
wheel and axle 
b)
lever
c)
inclined plane 
d)
pulley 
26.

Which of the following can a simple machine do?

a)

changes the amount of force needed

b)

changes the distance over which a force will act

c)

change the direction of the applied force

d)

all of the above

27.
Two examples of a pulley...
a)
knife & axe blade
b)
lightbulb & screw
c)
flagpole hoist & window blinds
d)
catapult & teeter totter
28.
Which is an example of someone using a simple machine to do work?
a)
a boy runs across a football field
b)
a banker counts money
c)
a mother pushes a stroller up a ramp
d)
a girl eats a sandwich
29.
Name this simple machine.
a)
Lever
b)
Wedge
c)
Pulley
d)
Inclined Plane
30.
Name this simple machine. 
a)
Wheel and Axle
b)
Lever
c)
Pulley
d)
Wedge
31.
Name this simple machine. 
a)
Screw
b)
Lever
c)
Pulley
d)
Wedge
32.
Which choice is an example of a pulley?
a)
Axe
b)
Seesaw
c)
Crane 
d)
Tunnel
33.
Which example below is NOT an example of a lever?
a)
Tweezers
b)
Escalator
c)
Hockey stick
34.
A ______ is a grooved wheel with a rope running along the groove.
a)
lever
b)
pulley
c)
screw
35.

A simple machine that can split things apart or hold a door open. It is a pair of inclined planes back to back.

a)

wedge

b)

screw

c)

lever

36.
A simple machine that is made up of an incline plane wrapped around a cylinder. It is often used to hold things together.
a)
lever
b)
screw
c)
wedge
37.

An ideal (perfect) machine would have an efficiency of

a)

0%

b)

6%

c)

50%

d)

100%

38.

What measures the rate of a machine's work output to its work input?

a)

A spring scale

b)

Mechanical advantage

c)

Mechanical efficiency

d)

Newton-meter

39.

When you raise your leg, what acts as the fulcrum for your thighbone?

a)

Ankle

b)

Hip

c)

Shoulder

d)

Neck

40.
What is kinetic energy?
a)
Stored energy of an elastic or springlike object
b)
The attraction between two objects
c)
Energy of motion
d)
Stored energy
41.
Potential Energy is...
a)
Stored energy of an object based on its height off of the ground
b)
Energy stored in molecules like our food
c)
Energy of motion
d)
Stored energy
42.
Conservation is...
a)
The amount of matter in an object
b)
A push or a pull
c)
The idea that energy cannot be created or destroyed, it can only change forms
d)
Stored energy of an elastic or springlike object 
43.
Gravitational Potential Energy (GPE) is defined as....
a)
Stored energy of an elastic or springlike object
b)
Stored energy
c)
Stored energy of an object based on its height off of the ground
d)
The attraction between two objects 
44.
It takes 20 N of force to move a box a distance of 10 m. How much work is done on the box in Joules?
a)
200 J
b)
20.0J
c)
100 J
d)
10 J
45.
Two factors that determine work are
a)
size of the force, and distance
b)
size of the force, and type of force
c)
mass, and distance
46.
units for work are
a)
netwons
b)
joules
c)
meters
d)
seconds
47.

work transfers

a)

sweat

b)

energy

c)

velocity

d)

effort

48.
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
49.
 Work done = Force x blank?
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
50.
If you do 40 joules of work lifting a 10N box, how high is the shelf you move it to.
a)
400m
b)
40m
c)
50m
d)
4m
51.
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
52.
Ms. McDonald holds a desk perfectly still above her head. If she holds the desk at a height of 0.5 meters above her head, and applis 68 Newtons of force to do so, how much work has she done?
a)
34 Joules
b)
0 Joules
53.
How are force and distance related?
a)
As distance increases, force increases.
b)
As distance increases, force decreases.
54.
There is a bell at the top of a tower that is 45 m high. The bell weighs 100 kg. What is the potential energy of the bell?
a)
980 J
b)
441 J
c)
4,500 J
d)
44,100 J
55.
Which of the following has the GREATEST IMPACT on the kinetic energy of an object?
a)
Mass 
b)
Velocity
c)
Height
d)
The acceleration due to gravity
56.
A skydiver jumps from a plane and is halfway through her descent. At this point in time she has...
a)
Kinetic Energy
b)
Gravitational Potential Energy
c)
Both Kinetic and Gravitational Potential Energy
d)
She has no energy
57.
Which of the following has the greatest amount of kinetic energy?
a)
A small baby running at 15 m/s
b)
A toddler running at 15 m/s
c)
Mrs. Rewerts running at 15 m/s
d)
Arnold Schwarzenegger running at 15 m/s screaming "Get to the choppa!"
58.
At which point is potential energy greatest
a)
W
b)
X
c)
Y
d)
Z
59.
As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 
a)
Both the potential energy and kinetic energy decrease
b)
The potential energy decreases while the kinetic energy increases 
c)
The kinetic energy decreases while the potential energy increases 
d)
Bothe the potential energy and kinetic energy increase 
60.
At which point is kinetic energy greatest 
a)
W
b)
X
c)
Y
d)
Z
61.
When a pendulum swings, at which point is kinetic energy highest: 
a)
1
b)
2
c)
3
d)
4
62.
When a pendulum swings, at which point is potential energy at its greatest
a)
1
b)
2
c)
3
d)
4
63.
What kind of energy is in a rock at the edge of a cliff?
a)
Potential
b)
Kinetic
64.
 What kind of energy is in gasoline in a car tank (car is not on)?
a)
Potential
b)
Kinetic
65.
What kind of energy is in basketball passing through the hoop?
a)
Potential
b)
Kinetic
66.
Energy can not be created or destroyed, only converted from one form to another.
a)
true
b)
false
67.
P=25 watts 
W=5000 Joules 
t=???
a)
200 sec
b)
0.0005 s
c)
125000 s
d)
125 s
68.
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
69.
An engine reaches its top speed from rest in 7.5 s. It is able to perform 250,000 J of work in that time.  How much power does this engine have in that time? 
a)
0.00003 W
b)
33,333 W
c)
1,875,000 W
d)
1873 W
70.
How much time is needed to produce 720 Joules of work if 90 watts of power is used? 
a)
0.125 s
b)
8 s
c)
64800 s
d)
80 s
71.
If 68 W of power is produced in 18 seconds, how much work is done?
a)
1,224 J
b)
0.264 J
c)
3.77 J
d)
12.24 J
72.
What is the definition of power?
a)
the amount of work an object does
b)
the rate at which force is applied
c)
the amount of matter in an object
d)
the rate at which work is done
73.
What is the equation for work?
a)
W = mass * acceleration
b)
W = force * distance
c)
W = force/distance
d)
W = speed/time
74.
What is the equation for power?
a)
P = Work/time
b)
P = Force/time
c)
P = time/distance
d)
P = Work * time
75.
A kid throws a ball with a force of 70N over 1.1 meters. How much work did he do?
a)
77 joules
b)
70 joules
c)
7.7 joules
d)
11 joules
76.
A wheel is a modification of a(n)
a)
screw
b)
lever
c)
inclined plane
d)
wedge
77.
Which of the following is not an inclined plane?
a)
wrench
b)
axe
c)
chisel
d)
ramp
78.
"The total kinetic energies of all particles in an object" describes what kind of energy?
a)
radiant
b)
thermal
c)
electrical
d)
magnetic
79.
Inclined planes reduce the ______ to raise a load.
a)
distance
b)
effort
c)
resistance
d)
work
80.
Machines in the "real world" cannot produce as much energy as they receive because of the presence of ...
a)
work
b)
levers
c)
friction
d)
power
81.
Which of the following is an example of KE
a)
A car in a driveway
b)
a bird flying through the air
c)
A rock sitting on a cliff
d)
A couch in your house
82.
A weightlifter presses a 400 N weight 0.5 m over his head in 2 seconds. What is the power of the weightlifter?
a)
400 W
b)
100 W
c)
100N
d)
400 N
83.
 16.  A medicine ball has a mass of 5 kg and is thrown with a speed of 2 m/s. What is its kinetic energy?
a)
500 J
b)
10 J
c)
2000J
d)
100 J
84.
How much power is required to lift a 2.0 kg object 5 meters in 4.50 seconds?  
a)
0.45 Watts  
b)
2.22 Watts
c)
21.8 Watts
d)
45.0 Watts 
85.
The efficiency of a machine is always less than 100 percent because
a)
a machine cannot have an IMA greater than 1. 
b)
some work input is lost to friction.
c)
the work input is too small.
d)
the work output is too great.
86.
Maria's parents asked her to rake the leaves in the backyard. To complete one section of the yard, Maria pulled the rake 10 meters. She applied 100 newtons of force. How much work did the rake do?
a)
1,000 joules
b)
10 joules
c)
1,000 watts
d)
No work was done
87.
Work is best described as _______.
a)
the use of force to either move an object or keep it from moving
b)
the use of energy to move an object some distance in any direction
c)
the use of power to move an object in a specific direction
d)
the use of force to move an object some distance
88.
The ability to do work is
a)
power
b)
energy
c)
thermal
d)
kinetic
89.
What kind of energy?
a)
Thermal
b)
Chemical
c)
Electrical
d)
Sound
90.
When two or more simple machines are combined, it is called a ___________ machine.
a)
compound
b)
complex
c)
mechanical
91.
Which simple machine is part of the lever family?
a)
pulley
b)
wedge
c)
screw
92.
Mechanical advantage is expressed ...
a)
in newtons squared
b)
in joules
c)
without any units
d)
in joules squared
93.
In a second-class lever, ...
a)
the effort is located between the fulcrum and the resistance
b)
the resistance is located between the fulcrum and the effort
c)
the fulcrum is located between the effort and the resistance
d)
the resistance is located at the end of the lever
94.
The unit for power is the ...
a)
watt
b)
joule
c)
newton
d)
dyne
95.
Energy can cause an object to ______________ the position of its motion. 
a)
Energy
b)
Change
c)
Speed
d)
Stored
96.
What kind of energy is in a moving skateboard?
a)
Potential
b)
Kinetic
97.
Can energy be destroyed?
a)
no
b)
yes
98.
Can energy be changed?
a)
yes
b)
no
99.
What kind of energy is in a rock at the edge of a cliff?
a)
Potential
b)
Kinetic
100.
Energy stored in the height of an object is called ___________ potential energy.
a)
Elastic
b)
Chemical
c)
Gravitational
d)
Nuclear
101.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
102.
What type of energy is in this picture?
a)
Kinetic
b)
Potential
c)
Chemical
d)
Sound
103.
A battery converts what type of energy to another?
a)
electrical to chemical
b)
electrical to thermal
c)
mechanical to electrical
d)
chemical to electrical
104.
What energy transformation occurs when an oven is powered on?
a)
Electrical -->Thermal
b)
Thermal --> Electrical
c)
Chemical -->Electrical--> thermal
d)
Electrical --> chemical 
105.
Explain the energy transfer in the scenario below. “Josh used a hot plate to boil a beaker of water”
a)
 Thermal -> electrical 
b)
   Electrical -> thermal 
c)
   Electrical -> Radiant
d)
Electrical -> electrical-> thermal
106.

The picture showing the energy conversion

Light → chemical

is:

a)
b)
c)
d)
107.

During digestion, which of the following energy conversions occurs?

a)

Chemical energy to heat energy

b)

Electrical energy to chemical energy

c)

Mechanical energy to heat energy

d)

Heat energy to chemical energy

108.
Forces that have a net force of zero ( the object is still).
a)
Balanced force
b)
Unbalanced force
109.
What is the net force?
a)
17 N Right
b)
3 N Right
c)
3 N Left
d)
17 N Left
110.
What is the magnitude (size) and direction of the net force?
a)
14 N Down
b)
14 N Up
c)
6 N Up
d)
6 N Down
111.
What is the net force?
a)
10 N
b)
0 N
c)
25 N
d)
1 N
112.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
113.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
114.
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
115.
With unbalanced forces, the object will move in the direction of the _______ force.
a)
larger 
b)
smaller 
c)
equal 
116.
Energy of motion is which type of energy?
a)
Potential
b)
Kinetic
c)
Sound
d)
Gravitational
117.
What type of energy is in this picture?
a)
Kinetic
b)
Potential
c)
Chemical
d)
Sound
118.
What kind of energy does this device use?
a)
Chemical
b)
Electrical
c)
Thermal
d)
Chemical
119.
What kind of energy is represented in the picture?
a)
Thermal
b)
Chemical
c)
Sound
d)
Nuclear
120.
A battery converts what type of energy to another?
a)
sound to kinetic
b)
light to heat
c)
mechanical to electrical
d)
chemical to electrical
121.
The glow sticks produce light for a short amount of time. The light from the glow stick is a conversion from what to what?
a)
thermal to light
b)
gravitational to potential
c)
radiant to electrical
d)
chemical to light
122.
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
123.
What machine changes electrical energy into light and sound energy?
a)
battery
b)
lightbulb
c)
alarm clock
d)
apple
124.
On a roller coaster, where is maximum potential 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
125.
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
126.
Energy that is stored in bonds between atoms is:
a)
Mechanical energy
b)
Chemical energy
c)
Kinetic energy
d)
Nuclear energy
127.
Energy that comes from the nucleus of an atom. A form of potential energy.
a)
chemical energy
b)
Nuclear energy
c)
Sound energy
d)
Electrical energy
128.
According to which law of energy, energy can't be created or destroyed?
a)
First law of motion
b)
The law of tacos
c)
Laws of Energy
d)
law of conservation of energy
129.
What machine changes chemical energy into heat, light and sound energy
a)
blender
b)
firecracker
c)
lightbulb
d)
apple
130.
What kind of energy is in a moving skateboard?
a)
Potential
b)
Kinetic
c)
Both potential and kinetic energy
d)
none of the above
131.
Which is the best example that something has kinetic energy?
a)
a. a car parked on a steep hill 
b)
b. a tennis ball rolling across the court
c)
c. a picture hanging on the wall 
d)
d. a piece of coal before it's burned 
132.

How much kinetic energy is contained by a 1.0 kg ball moving at 3.0 m/s?

a)

3 N

b)

3 J

c)

4.5 J

d)

9 J

133.

Calculate the potential energy of a 5-kg object sitting on a 3-m ledge.

a)

15 J

b)

15 N

c)

150 N

d)

150 J

134.

A ball is thrown upward with an initial velocity of 10 m/s. what is the maximum height that the ball will reach?

a)

5 m

b)

10 m

c)

100 m

d)

the mass of the ball should be given

135.

For a 2.0-kg mass to have 8.0 J of kinetic energy, the speed should be

a)

4.0 m/s

b)

2.0 m/s

c)

2.8 m/s

d)

8.0 m/s

136.

which of the following is a scalar?

a)

velocity

b)

momentum

c)

energy

d)

acceleration

137.

As the earth revolves around the sun at a constant speed, its kinetic energy

a)

increases

b)

decreases

c)

remains constant

d)

changes directions

138.

The ability to do work is

a)

energy

b)

force

c)

power

d)

momentum

139.

When the speed of the object doubles, its kinetic energy will

a)

also doulbe

b)

become quardruple

c)

be halved

d)

remain the same

140.

1 Joule (J) is equal to

a)

1 kg.m2/s2

b)

1 N

c)

1 kg.m/s

d)

1 kg.m/s2

141.

A skier starts at the top of a hill. On which does her gravitational potential energy change the most?

a)

a

b)

b

c)

c

d)

d

e)

the same

142.

A skier starts at the top of a hill. On which run would her speed at the bottom be the fastest?

a)

a

b)

b

c)

c

d)

d

e)

the same

143.

Newton's 1st Law is also called the Law of ...

a)

Friction

b)

Inertia

c)

Unbalanced forces

d)

Newtons

144.
An object in motion tends to stay in motion unless an ___ force acts on it.
a)
unbalanced
b)
balanced
145.
The tendency of an object to resist a change in motion is...
a)
inertia
b)
kinetic energy
c)
vector
d)
net force
146.
Objects with greater _________ also have greater inertia.
a)
speed
b)
mass
c)
temperature
d)
friction
147.
The law of inertia (Newton’s First Law) applies
a)
to both moving and nonmoving objects
b)
only to moving objects
c)
only to objects that are not moving
148.

Because of inertia, a moving object will keep ________ unless acted on by an unbalanced force.

a)

at rest

b)

moving

c)

in one spot

d)

inertia

149.
Because of inertia, a resting object will remain at ________.
a)
rest
b)
a constant speed
c)
school
d)
inertia 
150.
What kind(s) of objects have inertia?
a)
all objects with mass
b)
only objects at rest
c)
only objects in motion
d)
only objects whose motion is being changed
151.
You push on a car and it does not move.  What is true about the inertia?
a)
The inertia is changing
b)
The inertia of the car is too great 
c)
The inertia of the person is equal to the car
d)
There is not inertia because of no movement
152.
Galileo found that a ball rolling down one inclined plane would roll how far up another inclined plane? 
a)
The ball would not rull up the other plane at all. 
b)
to nearly the original height
c)
to nearly twice the original height. 
d)
to nearly half it original height
153.
An object following a straight-line path at a constant speed 
a)
has zero acceleration
b)
has no forces acting on it
c)
has a net force acting in the direction of motion
d)
none of these
154.
One object has twice as much mass as another object. The first object also has also twice as much...
a)
velocity
b)
gracitational acceleration
c)
inertia
d)
all of these
155.
If a hockey puck slides on a frictionless force it will eventually slow down because of its inertia.
a)
True
b)
False
156.
Objects at rest remain at rest and objects traveling at a steady rate in a straight line continue that way until a _________acts on them.  
a)
force
b)
velocity
c)
inertia
d)
acceleration 
157.
Why is the net force 0 in the image?
a)
Because the elephants are the same size
b)
Because they are both pulling the same amount of force in opposite directions
c)
Because they are elephants
d)
Because they are pulling away from each other.
158.

Mixtures can be separated by _______________ means.

a)

Any

b)

No

c)

Chemical

d)

Physical

159.

Are elements and compounds, pure substances or mixtures?

a)

Mixtures

b)

Pure Substances

c)

Compounds

d)

All of the above

160.

An example of a compound would be ______________

a)

H2O

b)

N

c)

O2

d)

Ar

161.

A substance that is made of two or more different types of atoms bonded together is a ______________________

a)

Mixture

b)

Compound

c)

Molecule

d)

Element

162.

Salad, Chex Mix, and Lemonade are examples of _________________

a)

Mixtures

b)

Compounds

c)

Molecules

d)

Elements

163.

Hydrogen, Calcium, and Boron are examples of ______________

a)

Mixtures

b)

Compounds

c)

Molecules

d)

Elements

164.

A combination of different substances that remain the same individual substances and can be separated is a what?

a)

Mixture

b)

Compound

c)

Molecule

d)

Element

165.

All matter can be either pure or ___________________

a)

The same

b)

Mixed

c)

Different

d)

Changing

166.

A substance that contains only a single type of atom is a _____________

a)

Mixture

b)

Compound

c)

Molecule

d)

Element

167.

Can we break an element down anymore?

a)

Yes

b)

No

c)

Maybe

d)

None of the above

168.

What are the two different types of mixtures?

a)

Endothermic and Exothermic

b)

Exothermic and Homogeneous

c)

Heterogeneous and Homogeneous

d)

Endothermic and Heterogeneous

169.

Compounds can be separated by _________________ means.

a)

Physical

b)

Chemical

c)

No

d)

Any

170.

An example of a pure substance is __________.

a)

Pizza

b)

Dirt

c)

Blood

d)

Water

171.

Are mixtures pure substances?

a)

Yes

b)

No

c)

Maybe

d)

Unlikely

172.

If two Oxygen atoms bond with one Carbon atom to for Carbon Dioxide, Carbon Dioxide is a __________________.

a)

compound

b)

mixture

c)

element

d)

atom

173.

An example of an element would be ____________.

a)

H2O

b)

NaCl

c)

Co2

d)

AL

174.

The following picture is a ____________________.

a)

Compound

b)

Mixture

c)

Element

d)

Molecule

175.

Gold (Au) is an example of an ______________________.

a)

Element

b)

Compound

c)

Mixture

d)

Molecule

176.

An example of a mixture is ____________________.

a)

Heliium

b)

Table salt

c)

Sugar Water

d)

Potassium

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