In order for the lever to be in effect, there has to be one of a number of factors. If a heavier person is closer to the bar (fulcrum), than a lighter person, then we have a first class lever. A second class lever would be if someone is moving the end of the board from closer to the bar. The third class lever would be someone between the bar and the end, being lifted by someone else at the far end.
Normally, teeter totters aren't being used as levers.i dont get it !
1st class lever
There are three types of lever, with examples as follows: A seesaw (teetertotter) is a Class 1 lever A wheel barrow is a Class 2 lever A pair of scissors is a Class 3 lever
wedge is another simple machine kind of lever
it is a 2nd class lever
it is a 2nd class lever
it is a 2nd class lever
Lever.
First class lever.
Fist class lever
lever
is a 2 class 2 lever
first class lever
One kind is the fulcrum