While opening a bottle cap using a bottle opener, the resistance offered by the cap acts as the ______.
Load
A bottle opener is a simple machine of the lever family. In any lever three points matter: the fulcrum (pivot), the effort (the force we apply) and the load (the resistance to be overcome).
When we lift the handle of the bottle opener, the edge of the opener presses on the metal cap. The stiffness of the crimped cap is the resistance that we are trying to overcome. This resistance is, by definition, the load.
Effort is wrong because effort is what the hand supplies at the handle, not what the cap offers. Energy source is not a mechanical-advantage term used for levers. Machine refers to the bottle opener itself, not to the cap's resistance.
Hence, the resistance offered by the cap acts as the load.
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