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Simple Machines
Test Description: Simple Machines
Instructions: Answer all questions to get your test result.
1) All of the following are ways that simple machines make work easier EXCEPT
A
decreasing the amount of force that is exerted
B
changing the direction in which the force is exerted
C
changing the distance over which a force is exerted
D
decreasing the amount of work that is done
2) What is the purpose of simple machines?
A
increase work
B
change force or distance
C
eliminate work
D
decrease work
3) Some people use a bottle opener when opening a bottled drink because they
A
use less energy
B
do less work
C
have to push harder
D
don't have to push so hard
4) Using an inclined plane to do the work of moving the wheelbarrow load up to the next level, rather that lifting the wheelbarrow straight up, Sally was able to use
A
the same effort force but the same distance was now at an angle
B
less effort force but had to move a greater distance
C
less effort force and was able to move the same distance
D
more force but over less distance
5) Which of the following best describes why a person may not be able to lift up a full wheelbarrow by its handles?
A
The wheelbarrow weight is not enough to overcome the effort force
B
The effort force is not enough to raise the fulcrum
C
The effort force is not enough to overcome the wheelbarrow weight
D
The wheelbarrow weight is not enough to rasie the fulcrum
6) Why would Sam use the pulley to lift the heavy load?
A
It makes the load lighter
B
It changes the direction of Sam's pulling force
C
It makes the load smaller
D
It changes the direction of the force of gravity
7) A large rock and a long, thick board could be used to construct which simple machine?
A
fulcrum
B
pulley
C
lever
D
screw
8) Matt uses a ramp to get a box up into his tree house. For th work that he did, what did the ramp decrease?
A
Height lifted
B
Force applied
C
Weight of the box
D
Distance moved
9) The pulley on a flagpole makes it easier to raise the flag because
A
it changes the direction of the force the man uses
B
it makes the flag lighter
C
it moves the flag a shorter distance
D
it increases the amount of work needed
10) The handle of a nail clipper works as a lever. How does the lever help you?
A
It makes you push the handle harder.
B
It makes work easier.
C
It stays closed.
D
It is always open.
*select an answer for all questions
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