Non-linear Power Point
7th Grade Super Review
By: Ms. Stipa
Work and Simple Machines
Review
This is a short review to test your mind. Do you know what it means to do work?
Can you identify simple machines and their uses?
For each question, select the best answer. Follow the onscreen directions and
navigation buttons to make your way through the questions.
Question 1
Which is an example
of work?
A). Spending all day to
writing a report.
B)Leaning against the wall.
C)Holding two books for
ten seconds.
D) Raising and lowering a
light object three times.
Oops!
That’s okay. Go back and try
again 
You’re a smartie pants!
Good work!
Question 2
In order to do work
on an object, such
as pulling a sled, the
force must:
A) Be at a constant velocity
in the direction of the
force.
B) Accelerate at 9.8 m/s2.
C) Be exerted in the same
direction as the object’s
motion.
D) Move some distance.
Oops!
That’s okay. Go back and try
again 
You’re a smartie pants!
Good work!
Question 3
If you exert a force,
do you always do
work?
A) Yes. A force is a force, no
matter what direction it
moves. So, you always do
work.
B) No. Force must cause
motion that is in the same
direction as the force.
C) Yes. The force is within us
all… Now, where did I
leave my lightsaber…?
D) No. You only do work when
the force moves the object
forward.
Oops!
That’s okay. Go back and try
again 
You’re a smartie pants!
Good work!
Question 4
How do machines
make work easier if
they do not
decrease the
amount of work you
need to do?
A) Machines alter the force the
pulls objects toward each
other (gravity).
B) Machines change the
amount of input force
required, the input distance
required, and/or the direction
of a force.
C)Machines overcome friction.
Oops!
That’s okay. Go back and try
again 
You’re a smartie pants!
Good work!
Question 5
Which is not an
example of how a
machine can make
work easier?
A) Multiplying input force
B) Adjusting gravity to
make the object lighter.
C) Increasing output
distance
D) Changing the direction
of the input force.
Oops!
That’s okay. Go back and try
again 
You’re a smartie pants!
Good work!
A)A wheel.
Question 6
Which is an example
of a simple
machine?
B)A doorknob.
C)A flashlight.
D)A car.
Oops!
That’s okay. Go back and try
again 
You’re a smartie pants!
Good work!
Question 7
To lift a heavy box to
the second floor of
our school and
through a window,
would you use:
A) An inclined plane going
up the stairs?
B) A lever to raise it up.
C) A pulley system.
D) A wedge.
Oops!
That’s okay. Go back and try
again 
You’re a smartie pants!
Good work!
References
Science Explorer: Motion, forces, and
energy. Teacher’s Edition (2002).
Needham, MA: Prentice Hall.
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