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Simple Machines
Test Description: This test is about simple machines from an 8th grade Physics class.
Instructions: Answer all questions to get your test result.
1) Which of these is a second class lever...
A
hockey stick
B
scissors
C
wheelbarrow
D
seesaw
2) The IMA (Ideal Mechanical Advantage) of a simple machine includes:
A
input distances
B
output friction
C
output forces
D
input friction
3) The efficiency of a simple machine increases when...
A
friction is decreased
B
the IMA is greater than 1
C
the IMA is less than 1
D
friction is increased
4) Work output is always, ________________, because of friction.
A
less than work input
B
impossible to measure
C
equal to work input
D
greater than work input
5) A single movable pulley has...
A
an input distance less than output distance
B
an IMA of 2
C
an IMA of 1
D
an input force greater than output force
6) A screw is a type of...
A
inclined plane
B
lever
C
wheel and axle
D
fulcrum
7) The thinner the wedge, keeping the length constant,...
A
the more the input force.
B
the greater the IMA.
C
the less the IMA.
D
the less input distance.
8) A pulley system has an AMA (Actual Mechanical Advantage) of 2. Which of these is true?
A
friction is not a factor
B
force-in is more than force-out
C
force-in is less than force-out
D
force-in is equal to force-out
9) Which of these is most like an inclined plane?
A
a gear
B
a screw
C
a wheel and axle
D
a pulley
10) Which of these is true about a single fixed pulley (without friction)?
A
IMA is greater than 1
B
input force is equal to output force
C
input force is greater than output force
D
the AMA is greater than 1
*select an answer for all questions
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