A door is a class - 2 lever.
Yes
yes
It is a third class lever machine because The effort is in between the load(food) and the fulcrum(handle)
Second or third cant remember which.
second class lever
The nearer the handle is to the hinge (fulcrum) the harder it is to open the door, this is known as the lever principle and is widely known throughout physics. A door and hinge is known as a class two lever.
The door knob is a lever
Class 1 lever
3rd class lever
1st class lever3rd class lever
The Class Lever for Pliers is a class 2 lever.
Class 3 Lever! You Don't even know that!