What class lever is a lever?

A lever is a rigid bar that is free to rotate, or pivot, on a fixed point. The fixed point on a lever is a fulcrum. Frist-Class LeversSecound-Class LeversThird-Class Levers

It can be either.The little bolt that connects the two scissor blades is considered the fulcrum (axis of rotation).The distance between that fulcrum and the handle of the scissors where you're...

Neither. Scissors are a first class lever, because the fulcrum is between your effort and your resistance.

A first class lever takes place when the fulcrum is between the force and load. This is possible by lifting the pole and balancing it with your hand. A second class lever takes place when the load is...

A crane is a first class lever when it is winching in or out the rope attached to a load. The crane becomes 3rd class lever when it's boom is luffing, i.e. it is being lowererd or raised.