Levers Question Preview (ID: 23257)
Simple Machines.
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On a lever, the fulcrum is...
a) the object being lifted or moved
b) the point the lever balances, or pivots, on
c) the point where force is applied to the lever
d) the spot where the lever is weakest
On a lever, the load is...
a) the point the lever balances, or pivots, on
b) the point where force is applied to the lever
c) the object being lifted or moved
d) the center of gravity
On a lever, the effort is...
a) the point where force is applied to the lever
b) the point the lever balances, or pivots, on
c) the object being lifted or moved
d) the spot where the load is placed
In a 1st class lever, the fulcrum should be placed....
a) as far away from the load as possible
b) in the exact middle
c) as close to the effort as possible
d) as close to the load as possible
In a 2nd class lever, the load should be placed....
a) as far away from the fulcrum as possible
b) as close to the fulcrum as possible
c) as close to the effort as possible
d) in the exact middle
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) as close to the fulcrum as possible
d) in the exact center
In a 1st class lever, the
a) fulcrum is between the effort and the load
b) load is between the effort and the fulcrum
c) effort is between the fulcrum and the load
d) fulcrum can be placed anywhere
In a 2nd class lever, the
a) fulcrum can be placed anywhere
b) effort is between the fulcrum and the load
c) load is between the effort and the fulcrum
d) fulcrum is between the effort and the load
In a 3rd class lever, the
a) load is between the effort and the fulcrum
b) fulcrum can be placed anywhere
c) fulcrum is between the effort and the load
d) effort is between the fulcrum and the load
Mechanical advantage refers to
a) how much a simple machine increases the force being applied
b) how much a simple machine decreases the force being applied
c) how a simple machine keeps forces the same
d) how much a simple machine reduces input force
To determine the mechanical advantage of a lever, you
a) divide the length of the load arm by the length of the effort arm
b) multiply the length of the load arm by the length of the effort arm
c) divide the length of the effort arm by the length of the load arm
d) multiply the length of the effort arm by the length of the load arm
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 the same distance
d) apply that force over a shorter time
A lever with an effort arm of 12 feet, and a load arm of 2 feet, would have a mechanical advantage of...
a) 24
b) 6
c) 10
d) 14
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