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Worksheets7th Grade Physics Review
Total questions: 79
Worksheet time: 1hrs 28mins
Name
Class
Date
1.
What is an example of an inclined plane?
a)
crane
b)
slide
c)
bike
d)
see-saw
2.
What is an example of a wheel and axle?
a)
ax
b)
light bulb
c)
skateboard ramp
d)
bus tire
3.
What is an example of a pulley?
a)
slide
b)
flag pole
c)
ax
d)
chapstick
4.
What is an example of a screw?
a)
arm
b)
ax
c)
light bulb
d)
ramp
5.
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
6.
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
7.
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
8.
What makes a bike stop rolling?
a)
unbalanced forces
b)
your mom
c)
Friction
d)
effort force
9.
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
10.
Which one is an effort force?
a)
blocks in a wagon
b)
person pushing a carriage
c)
friction
d)
Mrs. Herman
11.
What is an example of a lever?
a)
ramp
b)
car
c)
arm
d)
teeth
12.
What is an example of a wedge?
a)
door stop
b)
Your hair
c)
curtain
d)
wood screw
13.
In this illustration,
a)
the machine is decreasing mechanical advantage
b)
the machine is increasing mechanical advantage
c)
mechanical advantage is not changed
14.
Which of the following is true for the picture?
a)
elephant is the fulcrum, mouse is the effort, triangle is the load
b)
mouse is the fulcrum, triangle is the effort, elephant is the load
c)
triangle is the fulcrum, mouse is the effort, elephant is the load
15.
How can the lever be balanced?
a)
add weight to the right side
b)
move the fulcrum right
c)
move the heavier weight back
16.
To increase the mechanical advantage of a lever
a)
make
sure the fulcrum is in the middle of the lever
b)
move
the fulcrum closer to the load
c)
move
the fulcrum closer to the effort
d)
use a bigger fulcrum
17.
A push or pull is a
a)
load
b)
fulcrum
c)
force
d)
work
18.
________________ is done whenever a force moves an object a distance
a)
load
b)
friction
c)
force
d)
work
19.
An object being lifted or moved is a
a)
load
b)
fulcrum
c)
force
d)
work
20.
A simple machine that splits an object apart is a
a)
inclined plane
b)
fulcrum
c)
wedge
d)
lever
21.
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
22.
800 Newtons of force moving a distance of 20 meters will be how much work done?
a)
40 J
b)
1,600 J
c)
400 J
d)
16,000 J
23.
What is the unit of measurement for Power?
a)
Joules
b)
Newtons
c)
Watts
d)
Meters
24.
45,000 Joules of work done in 90 seconds results in how much power?
a)
50 watts
b)
500 watts
c)
5000 watts
d)
4,050,000 watts
25.
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
26.
A Mustang has more horsepower than your mom's minivan. What does this mean?
a)
The Mustang has a higher topspeed.
b)
The minivan has a worse gas mileage.
c)
The Mustang can do work faster.
d)
The Mustang will die.
27.
The unit used to measure work is the
a)
Watt
b)
Newton
c)
Joule
d)
meter
28.
Force is a _____ or _______
a)
simple complex
b)
push pull
c)
up down
d)
in out
29.
What is the unit for mass?
a)
Kilogram (Kg)
b)
Newton (N)
c)
Joule (J)
d)
Watt (W)
30.
The amount of work done in a certain amount of time is known as
a)
work
b)
effort force
c)
resistance force
d)
power
31.
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
32.
No machine in existence has 100% efficiency due to ____________________.
a)
magic
b)
friction
c)
smoke
d)
input
33.
A 5000N block is lifted 10 m. How much work was done?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
34.
The more POWER you use to move an object, the more work you do.
a)
True
b)
False
35.
If the weight of the block is 10N, how much force does one have to apply to lift it using this pulley (MA=2)?
a)
2N
b)
5N
c)
10N
d)
15N
36.
How does a single fixed puled, like the one seen here, help you do work?
a)
changes the direction of the force
b)
increases the amount of applied force
c)
decreases the amount of applied force
d)
allows you to pull the rope a shorter distance
37.
How can you decrease the effort force needed to push a weight to the top of the ramp?
a)
cover the surface with carpet
b)
increase the length of the ramp
c)
increase the height of the ramp
d)
decrease the length of the ramp
38.
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
39.
What is the mechanical advantage of the block and tackle used to lift the bale of cotton?
a)
1
b)
2
c)
3
d)
4
40.
This 2000 N weight is raised 1 meter by pulling 4 meters of rope. What force was required to pull the rope?
a)
500 N
b)
1000 N
c)
2000 N
d)
8000 N
41.
What is the net force?
a)
40 N left
b)
0 N Balalnced
c)
400 N right
d)
40 N right
42.
The tendency of an object at rest to stay at rest unless it is acted upon by a force is called ___________________
a)
inertia
b)
motion
c)
gravity
d)
lubricant
43.
A wheeled cart is moving to the right at a constant speed. Two forces of equal magnitude are acting upon the cart. Which of the following best describes the forces and motion of the cart?
a)
Balanced Forces, Constant Speed
b)
Balanced Forces, Acceleration
c)
Unbalanced Forces, Constant Speed
d)
Unbalanced Forces, Acceleration
44.
How will this object move?
a)
It won't move.
b)
It will move to the right.
c)
It will move to the left.
d)
It will move up.
45.
How will this object move?
a)
It won't move.
b)
It will move to the right.
c)
It will move to the left.
d)
It will move in both directions.
46.
What is the net force?
a)
30 N left
b)
25 N right
c)
5 N left
d)
55 N right
47.
Which could be an example of an unbalanced force?
a)
A plate sitting on a dining table
b)
A ball at the top of a hill that is not moving
c)
Earth orbiting the Sun
d)
A baseball that has been thrown to home plate.
48.
Calculate the Net Force.
a)
60N, Left
b)
40N, Right
c)
0N
d)
60N, Right
49.
Calculate the Net Force.
a)
40N, Left
b)
40N, Right
c)
0N, Balanced
d)
75N, Right
50.
You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?
a)
60 N right
b)
10 N left
c)
60 n right
d)
50 N left
51.
What is the net force?
a)
10 N
b)
0 N
c)
25 N
d)
1 N
52.
This is a rocket. The rocket pushes the fuel down. What is the other force in this interaction pair?
a)
The fuel pulls the rocket up.
b)
The fuel pushes the rocket up.
c)
The rocket pulls the earth up.
d)
The earth pulls the rocket down.
53.
Which force is so low that it causes the man to slip and fall?
a)
Gravity
b)
Friction
c)
Air Resistance
d)
Motion
54.
If these boys are pulling with the same amount of force. What will happen?
a)
The boy in blue will win.
b)
They will not move at all.
c)
The boy in red will win.
d)
Both will fall down.
55.
How could you make an object increase its speed?
a)
use less force
b)
use more force
c)
use no force
56.
Energy due to motion is ____________ energy.
a)
Potential
b)
Energy
c)
Kinetic
d)
Friction
57.
__________ is stored energy.
a)
Potential
b)
Kinetic
c)
None of the above
d)
All of the above
58.
The faster an object moves, the ________ kinetic energy it has.
a)
more
b)
less
c)
none of the above
d)
all of the above
59.
Can energy be destroyed
a)
no
b)
yes
60.
What kind of energy is in a moving skateboard?
a)
Potential
b)
Kinetic
61.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
62.
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
63.
Food has _________ energy.
a)
Potential
b)
Kinetic
c)
None of the above
d)
All of the above
64.
What energy is pulling an arrow back
a)
kinetic energy
b)
potential energy
c)
energy
65.
Where is potential energy converting to kinetic energy
a)
D-G
b)
C-F
c)
A-D
d)
A-G
66.
2. The diagram to the right represents a diver’s motion from the top of a high diving board into a pool of water. At what point does the diver have the greatest kinetic energy and the least potential energy?
a)
1
b)
2
c)
3
d)
4
67.
Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?
a)
Chemical to light
b)
Electrical to chemical
c)
Electrical to light
d)
Chemical to electrical
68.
Which of the following shows an energy transformation from chemical energy to electrical to light energy?
a)
A bolt of lightning lights the night sky.
b)
A candle glows brightly in the dark.
c)
A fire in a fireplace lights up a room.
d)
A battery causes a flashlight to shine.
69.
What energy transformations take place when a battery-operated radio is in use?
a)
Electrical to chemical to light
b)
Sound to chemical to mechanical
c)
Chemical to electrical to sound
d)
Light to electrical to thermal
70.
Which of the following devices transforms electrical energy into mechanical energy?
a)
An e-reader
b)
a fan
c)
a manual pencil sharpener
d)
ipod
71.
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
72.
The picture shows a microwave oven. As a microwave oven is operated, electrical energy is transformed into all of the following types of energy EXCEPT —
a)
solar
b)
light
c)
thermal
d)
mechanical
73.
Electrical Energy is transferred to _____ Energy.
a)
Thermal
b)
Solar
c)
Electrical
d)
None
74.
Solar Energy is transferred to _____ Energy.
a)
Mechanical
b)
Solar
c)
Sound
d)
Electrical
75.
When you eat pizza, Chemical Energy is transferred to _____ Energy.
a)
Solar
b)
Electrical
c)
Mechanical
d)
Chemical
76.
Mechanical Energy is transferred to _____ Energy.
a)
Solar
b)
Mechanical
c)
Electrical
d)
Potential
77.
Which of the following are NOT examples of kinetic energy?
a)
roller coaster at the top of the first hill
b)
roller coaster speeding down the first hill
c)
Ball flying through the air on its way to a catcher
d)
pistons moving up and down in an engine
78.
What would be the net force on an object if the object is traveling a constante velocity
a)
no net force
b)
Force X mass
c)
acceleration X mass
d)
Zero net force
79.
the tree types of friction are
a)
pushing, riding, stopping
b)
static, sliding, rolling
c)
rolling, pushing, sliding
d)
smooth, stop, run
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