seesaws
crowbars
sissors
oar attached to a boat
hammer removing a nail
fishing rod
pliers
teter totters
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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.
First class lever.
disadvantage of first class the fulcrum lies on more effort or more force.
Yes, a trolley is considered a second class lever. A hammer is considered a third class lever. Also, a clothes pin is considered a third class lever.
first class lever