Question : A hinged door is an example of:
Option 1: third order lever
Option 2: second order lever
Option 3: first order lever
Option 4: cantilever
Correct Answer: second order lever
Solution : The correct option is the second order lever .
A hinged door would be a class 2 lever . The fulcrum (pivot point) of a class 2 lever is placed between the effort (force applied) and the load (resistance). In the instance of a hinged door, the fulcrum is the hinge, the effort is the force provided by pushing or pulling the door handle, and the load is the weight of the door itself.
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