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WorksheetsPhysical Sc - Chap. 13 REVIEW (Work, Power, Energy & Machines
Total questions: 148
Worksheet time: 3hrs 45mins
Name
Class
Date
1.
How much time does it take a machine with 1200 W power rating to do 42 kJ of work?
a)
12 s
b)
35 s
c)
23 s
d)
44 s
2.
Kinley hit the softball with a force of 3000 N and applied 100 kJ of work. How far did the ball go?
a)
30 m
b)
0.03 m
c)
33.33 m
d)
30000 m
3.
Work is done when a weightlifter holds a barbell still above his head.
a)
True
b)
False
4.
Force is measured using which type of unit?
a)
Meters
b)
Kilograms
c)
Newtons
d)
Joules
5.
You push against the back of your friends car that is stuck. You push and be become very tired. Did you do work?
a)
Yes, work was done
b)
No, work wasn't done
6.
The amount of work done divided by the time interval during which the work is done is called...
a)
Work
b)
Power
c)
Energy
d)
Force
7.
Energy that is stored and held in readiness is called...
a)
Elastic Energy
b)
Kinetic Energy
c)
Potential Energy
d)
Mechanical Energy
8.
This type of energy requires that the object is in motion...
a)
Elastic Potential Energy
b)
Chemical Energy
c)
Gravitational Potential Energy
d)
Kinetic Energy
9.
A large stone raised to the top of a hill is known to have this type of energy...
a)
Elastic Potential Energy
b)
Chemical Energy
c)
Kinetic Energy
d)
Gravitational Potential Energy
10.
The unit used to measure work is the
a)
Watt
b)
Newton
c)
Joule
d)
meter
11.
Which of the following is the best example of work being done.
a)
doing homework
b)
lifting a box
c)
pushing a stationary box
d)
holding a box
12.
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
13.
Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level.
a)
250,000 J
b)
2,450,000 J
c)
2,451,663 J
d)
248 J
14.
Lilly's cat ran through your yard. The cat has a mass of 5 kg. He is running at a speed of 3 m/s. What is the kinetic energy of the cat as he runs?
a)
8.5 J
b)
45 J
c)
7.5 J
d)
22.5 J
15.
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
16.
What is the kinetic energy of a 9 kg book that has a speed of 4 m/s?
a)
18 J
b)
36 J
c)
72 J
d)
144 J
17.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
18.
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
19.
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
20.
If you push a coffee mug 1.4 m using a force of 5 N, the work done on the mug is?
a)
7 J
b)
6 J
c)
8 J
d)
9 J
21.
At which point(s) on the roller coaster is the kinetic energy at its maximum?
a)
A
b)
B
c)
C
d)
D
22.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
23.
which point has the most potential energy
a)
G
b)
B
c)
C
d)
F
24.
The ability to do work or cause change
a)
work
b)
power
c)
energy
25.
the rate at which work is done
a)
power
b)
work
c)
energy
d)
effort force
26.
A machine made up of two or more simple machines
a)
simple machine
b)
complex machine
c)
effort force
d)
resistance force
27.
a machine that does work with only one movement of the machine
a)
simple machine
b)
complex machine
c)
effort force
d)
resistance force
28.
the number of times a machine increases a force exerted on it
a)
mechanical advantage
b)
effort force
c)
resistance force
d)
power
29.
The force that works against the effort force
a)
mechanical advantage
b)
effort force
c)
resistance force
d)
work
30.
The force that is applied to do work
a)
mechanical advantage
b)
effort force
c)
resistance force
d)
power
31.
Force exerted on an object that causes it to move
a)
power
b)
work
c)
effort force
d)
resistance force
32.
Energy is measured in watts.
a)
False
b)
True
33.
Kinetic energy is dependent upon height of an object.
a)
False
b)
True
34.
When you ride a playground swing, your potential energy is greatest at the lowest point.
a)
True
b)
False
35.
As speed increases, kinetic energy increases.
a)
True
b)
False
36.
Lowering an object decreases its potential energy.
a)
False
b)
True
37.
Power increases as time increases.
a)
True
b)
False
38.
Power and work are the same thing.
a)
False
b)
True
39.
As the force placed on an object increases, work and power will also increase.
a)
False
b)
True
40.
The kinetic energy of an object increases as its _____ increases.
a)
potential energy
b)
velocity
c)
mass
d)
both speed and mass
41.
Increasing the speed of an object does what to its potential energy?
a)
increases PE
b)
decreases PE
c)
doesn't change PE
d)
not enough information
42.
What is the SI unit for speed?
a)
joule
b)
watt
c)
meter
d)
meter/second
43.
In physics, we define work as this
a)
force x time
b)
force x distance
c)
force / time
d)
force / distance
44.
In physics, power is identified as this
a)
force x distance
b)
distance / time
c)
work / time
d)
time / work
45.
A 600 N hiker climbs a hill 100 meters high. How much work does he do?
a)
60,000 J
b)
32 J/s
c)
600 J
d)
8 W
46.
A boy pushes on a parked car with a force of 200 N. The car does not move. How much work does the boy do on the car?
a)
200N
b)
200J
c)
0J
d)
0N
47.
Rubbing your hands together is an example of....
a)
fluid friction
b)
rolling friction
c)
static friction
d)
sliding friction
e)
creepy evil genius behavior
48.
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
49.
Wheels on a skateboard most likely experiences-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
50.
Swimming fish experience-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
51.
Friction is a force that acts in an ___________ direction of movement.
a)
similar
b)
opposite
c)
parallel
d)
west
52.
What is NOT one of the six simple machines?
a)
Lever
b)
Pulley
c)
Hinge
d)
Screw
53.
What is being transferred as you do work?
a)
Energy
b)
Heat
c)
Power
d)
Gravitational Potential Energy
54.
Which one is NOT a simple machine?
a)
Lever
b)
Gear
c)
Wedge
d)
Pulley
55.
The energy of movement is...?
a)
Kinetic
b)
Potential
56.
Energy that is stored is called...
a)
Kinetic
b)
Potential
57.
The SI unit for power is...?
a)
Watts
b)
Joules
c)
Newtons
d)
Meters
58.
a)
A is Potential, B is Kinetic
b)
A is Kinetic, B is Potential
c)
A is Power, B is Work
d)
A is Work, B is Power
59.
What is g on Earth?
a)
9.8 m/s/s
b)
9.8 m/s
c)
42 m*s
d)
42 m/s/s
60.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
61.
Which of the following is an example of work being done?
a)
Teacher sitting in a chair
b)
Book resting on desk
c)
Keys hanging from a key chain
d)
A ball being rolled on the floor
62.
At the start of a ski jump, a skier begins at rest at the top of a hill. What types of energies are present?
a)
Kinetic
b)
Gravitational
c)
Kinetic & Gravitational
d)
Gravitational & Internal
63.
As the skier goes down the hill, ________ energy increases while _______ energy decreases.
a)
Gravitational; Kinetic
b)
Kinetic; Gravitational
c)
Elastic; Kinetic
d)
Kinetic; Elastic
64.
At the bottom of the hill, the skier jumps off of a ramp. The ramp causes the skier to _____.
a)
gain potential energy
b)
lose potential energy
c)
gain kinetic energy
d)
lose elastic energy
65.
Two riders of equal mass begin at the top of a hill. If friction is neglected, which rider will have the greatest velocity at the bottom of the hill?
a)
Rider A
b)
Rider B
c)
Both Riders will have the same velocity
66.
Riders on Knott's Berry Farm's Supreme Scream are lifted at a constant velocity to the top of the tower before experiencing a freefall down. As they are being lifted, the ______of the riders increases.
a)
Kinetic Energy
b)
Elastic Potential Energy
c)
Chemical Potential Energy
d)
Gravitational Potential Energy
67.
According to the scientific definition, in order for work to be done what has to occur?
a)
Exercise
b)
Steam
c)
Electricity
d)
Movement
68.
What two things do you need to know to calculate work?
a)
force and gravity
b)
distance and mass
c)
gravity and mass
d)
force and distance
69.
What does the work done on an object depend on?
a)
direction of force applied and direction of the motion
b)
direction of gravity and speed of object
c)
speed of object and air resistance
the angle of elevation and steepness of hill
the angle of elevation and steepness of hill
d)
weight of object and angle of force
70.
What is another name for a newton-meter?
a)
Newter
b)
Joule
c)
Kilogram
d)
Liter
71.
The ratio of output work to input work is called _________________ .
a)
Really hard work
b)
Efficiency
72.
Name the type of machine that is described: something that uses a rope and can change the direction of a force.
a)
Screw
b)
Wheel and axle
c)
Lever
d)
Pulley
73.
Which of these is a measurement of power?
a)
100 joules
b)
100 watts
c)
100 meters per second
d)
100 hertz
74.
Which of the following is true about work?
a)
It measures how quickly an object accelerates
b)
It measures how much effort is applied over a distance.
c)
It measures the change of an object's rate of speed.
d)
It measures how much time it takes to move an object.
75.
When is positive work done?
a)
When an object moves in the same direction as its force.
b)
When an object moves in the opposite direction as its force.
c)
When a force causes the object to move more quickly.
d)
When an object stops moving.
76.
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
77.
How do you know when a force has been applied to an object?
a)
It moves.
b)
It flies.
c)
It accelerates.
d)
It gets bigger.
78.
In which of these cases is work being done?
a)
A student sleeps all night.
b)
A student pushes a locked door that does not move.
c)
A student carries his chair into another room.
d)
A student sits on the carpet.
79.
A 500N block is lifted 10 m. How much work was done?
a)
5000 J
b)
500 J
c)
50 J
d)
5 J
80.
A bar that fixed to a point, but is free to move is known as a what?
a)
wedge
b)
inclined plane
c)
lever
d)
fulcrum
81.
In "real" machines, some of the input work is transferred to what?
a)
light
b)
heat
c)
mass
d)
electricity
82.
When you pick up an object, what do you transfer to the object?
a)
mass
b)
power
c)
energy
d)
watts
83.
How many simple machines are there?
a)
2
b)
4
c)
6
d)
7
84.
What is the force applied to the machine?
a)
work force
b)
effort force
c)
resistance force
d)
distance force
85.
What is a machine that does work with only one movement?
a)
complex machine
b)
simple machine
c)
ideal machine
d)
compound machine
86.
What is the distance through which the effort force is applied?
a)
work distance
b)
resistance distance
c)
output
d)
effort distance
87.
What term indicates the number of times a machine multiplies the effort force?
a)
mechanical advantage
b)
work
c)
power
d)
effort
88.
The amount of power produced or used depends on which of the following?
a)
work and time
b)
force and distance
c)
work and force
d)
time and distance
89.
What is a grooved wheel with a rope or cable running along the groove?
a)
lever
b)
pulley
c)
wheel and axle
d)
screw
90.
Decreasing which of the following will increase the efficiency of a machine?
a)
input force
b)
output force
c)
power
d)
friction
91.
What is two of more simple machines being used together?
a)
Lever
b)
Dual machine
c)
Triple machine
d)
compound machine
92.
What is the measure of how much input work is changed into output work?
a)
resistance force
b)
efficiency
c)
mechanical advantage
d)
effort force
93.
Why does a light bulb become hot to the touch?
a)
Because it is hot
b)
because it transforms electric energy into some thermal energy
c)
because it produces electric energy from chemical energy
d)
because of the chemical energy transforms into thermal energy and radiant energy
94.
What do we call a change from one form of energy to another?
a)
Energy change
b)
Energy transformation
c)
Energy creation
95.
Think about the Law of Conservation of Energy.
Which of the following is not true?
Which of the following is not true?
a)
Energy cannot be destroyed.
b)
Energy cannot be created.
c)
Energy cannot be transformed.
d)
Energy can only be transformed.
96.
When you are holding a book, energy is stored between the book and Earth; this type of energy is called ________ potential energy.
a)
Kinetic
b)
Potential
c)
Gravity
d)
Friction
97.
What type of energy is stored in a battery?
a)
electrical
b)
chemical
c)
thermal
d)
mechanical
98.
At what position would a cyclist have the most kinetic energy?
a)
A
b)
B
c)
D
d)
F
99.
Is this picture of a stopped roller coaster this is an example of _________________ energy?
a)
Kinetic Energy Only
b)
Gravitational Potential Energy
c)
Electrical Energy
d)
Nuclear Energy
100.
Kinetic Energy of wind is transferred to _____ Energy in a windmill.
a)
Solar
b)
Mechanical
c)
Electrical
d)
Potential
101.
Stored energy is another name for
a)
kinetic energy
b)
thermal energy
c)
potential energy
d)
sound energy
102.
A cell phone battery dies. It gets plugged into an electrical outlet to recharge. Which of the following energy transformations occur during the charging?
a)
mechanical to chemical
b)
electrical to solar
c)
chemical to light
d)
electrical to chemical
103.
Mr. Frohmberg thinks its too hot in the classroom. He plugs in a fan and turns it on, what energy transformation now occurs?
a)
mechanical to electrical
b)
electrical to mechanical
c)
chemical to mechanical
d)
electromagnetic to mechanical
104.
What is an example of a lever?
a)
ramp
b)
car
c)
arm
d)
teeth
105.
What is an example of an inclined plane?
a)
crane
b)
slide
c)
bike
d)
see-saw
106.
What is an example of a wheel and axle?
a)
ax
b)
light bulb
c)
skateboard ramp
d)
bus tire
107.
What is an example of a wedge?
a)
door stop
b)
Your hair
c)
curtain
d)
wood screw
108.
What is an example of a pulley?
a)
slide
b)
flag pole
c)
ax
d)
chapstick
109.
What is an example of a screw?
a)
arm
b)
ax
c)
light bulb
d)
ramp
110.
What is a screw?
a)
means attracted to a magnet
b)
an inclined plane that is wrapped around an axle
c)
stiff bar that rests on a fulcrum
d)
made of 2 inclined planes that are back to back
111.
What is a simple machine?
a)
stiff bar that rests on a fulcrum
b)
means attracted to a magnet
c)
an inclined plane that is wrapped around an axle
d)
a machine with few or no moving parts
112.
What is a lever?
a)
made of 2 inclined planes that are back to back
b)
means attracted to a magnet
c)
stiff bar that rests on a fulcrum
d)
made of 2 inclined planes that are back to back
113.
What is a machine?
a)
Mrs. Herman
b)
Ms. Putirskis
c)
Mrs. Brose
d)
a tool that makes work easier
114.
What is an inclined plane?
a)
wheels that turn on a post
b)
made from two or more simple machines
c)
flat surface that is higher at one end
d)
uses a wheel and a rope to lift a load
115.
What is a wheel and axle?
a)
wheel that turns on a post
b)
flat surface that is higher at one end
c)
made from two or more simple machines
d)
uses a wheel and rope to lift a load
116.
What is a compound machine?
a)
uses a wheel and rope to lift a load
b)
wheel that turns on a post
c)
flat surface that is higher at one end
d)
made from two or more simple machines
117.
What is a pulley?
a)
wheel that turns on a post
b)
uses a wheel and rope to lift a load
c)
made of two or more simple machines
d)
flat surface that is higher at one end
118.
What makes a bike stop rolling?
a)
unbalanced forces
b)
your mom
c)
Friction
d)
effort force
119.
Which one is an effort force?
a)
blocks in a wagon
b)
person pushing a carriage
c)
friction
d)
Mrs. Herman
120.
Which one is a resistance force?
a)
me pulling the leash
b)
you pushing a rock
c)
me pushing your desk
d)
weight of a car you are pushing
121.
Flagpole
a)
wedge
b)
pulley
c)
incline plane
d)
wheel and axle
122.
Lightbulb
a)
wedge
b)
pulley
c)
incline plane
d)
screw
123.
Stairs
a)
wedge
b)
pulley
c)
inclined plane
d)
wheel and axle
124.
A _______ pulley is used to reduce the amount of effort force.
a)
movable
b)
fixed
c)
single
125.
A _____ pulley only changes the direction of the force.
a)
movable
b)
fixed
c)
alternate
126.
A sloping force, like a ramp, that reduces the mount of force required to lift an object.
a)
screw
b)
wheel and axle
c)
inclined plane
127.
How can an incline plane reduce the amount of force required to lift an object?
a)
increase the length of the ramp
b)
increase the height of the ramp
c)
decrease the length of the ramp
128.
Why is no machine 100% efficient?
a)
some of the input energy is converted to mechanical energy in the environment
b)
some of the input energy is converted to chemical energy in the environment
c)
some of the input energy is converted to heat energy in the environment
d)
All machines can be 100% efficient
129.
Pedals, handle bars and handbrakes on a bicycle
a)
wedges
b)
pulleys
c)
incline planes
d)
levers
130.
This device
a)
wedge
b)
lever
c)
incline plane
d)
wheel and axle
131.
This device
a)
wedge
b)
lever
c)
incline plane
d)
wheel and axle
132.
How could I reduce the effort force needed to lift the load?
a)
move the fulcrum away from the load
b)
move the fulcrum closer to the load
c)
place the fulcrum in the middle
133.
What force opposes motion motion and decreases the efficiency of a machine?
a)
gravity
b)
friction
c)
pressure
134.
Screws and wedges are examples of what other type of simple machine?
a)
pulley
b)
inclined plane
c)
levers
d)
gears
135.
What type of simple machine is this?
a)
wheel and axle
b)
gear
c)
lever
d)
inclined plane
136.
What do you call a machine made up of two or more simple machines?
a)
complicated machine
b)
compound or complex machine
c)
comprehensive machine
d)
constructive machine
137.
Which of the following is NOT an example of a compound machine?
a)
scissors
b)
fishing pole
c)
ramp
138.
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
139.
A lever is designed to:
a)
reduce the amount of force required to do work
b)
increase the amount of effort required
c)
increase the amount of energy needed to work
140.
A ______ is a grooved wheel with a rope running along the groove.
a)
lever
b)
pulley
c)
screw
141.
Consists of two circular objects; a central shaft (axle) and a wheel.
a)
wheel and axle
b)
screw
c)
pulley
142.
A simple machine that can split things apart or hold a door open.
a)
wedge
b)
screw
c)
lever
143.
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
144.
Scissors are an example of a compound machine. What simple machines are used to make up this compound machine?
a)
2 levers and 2 inclined planes
b)
2 levers and 2 pulleys
c)
2 pulleys and 2 inclined planes
145.
A fishing pole is an example of a compound machine. What simple machines are used to make up this compound machine?
a)
lever, wheel and axle, pulley
b)
wheel and axle, inclined plane, pulley
c)
wheel and axle, pulley, inclined plane
146.
A simple machine is a device that helps to reduce the amount of _____ required to work.
a)
force
b)
energy
c)
work
147.
____ is done when a force is applied over a distance.
a)
energy
b)
work
c)
force
148.
What could I do to this machine to increase the efficiency?
a)
oil or grease it
b)
make it sharper
c)
make the ramp shorter
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