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Natasha2012 [34]
3 years ago
15

Mechanical advantage of a first class Lever can be one or greater than one or less than one why​

Physics
2 answers:
erastovalidia [21]3 years ago
8 0

Explanation:

Because they change the direction of force and multiply the effort.

They increase the rate of doing work.

So, MA of first class lever can be one or greater than one or less than one

yarga [219]3 years ago
7 0
There are three kinds of levers:

1) First Class Lever -- the effort and the load on either side of the fulcrum. Some examples would be a crowbar or a seesaw. The effort is only less than the load if the load is closer to the fulcrum. The lever then acts as a force magnifier and the mechanical advantage is greater than one. If the effort is closer to the fulcrum, then the effort is larger than the load and the mechanical advantage is less than one. In this case the lever acts as a movement magnifier.

2) Second Class Lever -- the load is between the fulcrum and the effort. An example is a nutcracker or a wheelbarrow. This type of lever always acts as a force magnifier and its mechanical advantage is greater than one.

3) Third Class Lever -- the effort is between the load and the fulcrum. An example is a pair of sugar tongs. This is a movement magnifier which means its mechanical advantage is less than one. The load moves more than the effort. (When you use sugar tongs, a small movement of the fingertips makes the jaws of the tongs move a lot
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