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Levers
Test Description: Simple Machines
Instructions: Answer all questions to get your test result.
1) On a lever, the fulcrum is...
A
the point where force is applied to the lever
B
the spot where the lever is weakest
C
the object being lifted or moved
D
the point the lever balances, or pivots, on
2) On a lever, the load is...
A
the center of gravity
B
the point the lever balances, or pivots, on
C
the object being lifted or moved
D
the point where force is applied to the lever
3) On a lever, the effort is...
A
the point where force is applied to the lever
B
the spot where the load is placed
C
the point the lever balances, or pivots, on
D
the object being lifted or moved
4) In a 1st class lever, the fulcrum should be placed....
A
as close to the effort as possible
B
as far away from the load as possible
C
in the exact middle
D
as close to the load as possible
5) In a 2nd class lever, the load should be placed....
A
as close to the fulcrum as possible
B
as close to the effort as possible
C
as far away from the fulcrum as possible
D
in the exact middle
6) In a 3rd class lever, the effort should be applied
A
as far from the load as possible
B
as close to the load as possible
C
in the exact center
D
as close to the fulcrum as possible
7) In a 1st class lever, the
A
fulcrum is between the effort and the load
B
effort is between the fulcrum and the load
C
load is between the effort and the fulcrum
D
fulcrum can be placed anywhere
8) In a 2nd class lever, the
A
effort is between the fulcrum and the load
B
fulcrum can be placed anywhere
C
load is between the effort and the fulcrum
D
fulcrum is between the effort and the load
9) In a 3rd class lever, the
A
fulcrum is between the effort and the load
B
load is between the effort and the fulcrum
C
fulcrum can be placed anywhere
D
effort is between the fulcrum and the load
10) Mechanical advantage refers to
A
how much a simple machine decreases the force being applied
B
how much a simple machine increases the force being applied
C
how much a simple machine reduces input force
D
how a simple machine keeps forces the same
11) To determine the mechanical advantage of a lever, you
A
multiply the length of the effort arm by the length of the load arm
B
multiply the length of the load arm by the length of the effort arm
C
divide the length of the load arm by the length of the effort arm
D
divide the length of the effort arm by the length of the load arm
12) Trading distance for effort means that you can use less force to move an object, but you'll need to...
A
apply that force over a shorter distance
B
apply that force over a longer distance
C
apply that force over a shorter time
D
apply that force over the same distance
13) A lever with an effort arm of 12 feet, and a load arm of 2 feet, would have a mechanical advantage of...
A
6
B
10
C
24
D
14
*select an answer for all questions
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