Asked by Jagdish Menghani | 27th Mar, 2013, 06:12: PM

Expert Answer:

There can be two reasons for it:
1. since we are using two fingers instead of one, now we have a more area of contact and thus lesser pressure on the fingers as pressure is inversely proportional to area.
2. Since while using a single finger to open a pen's cap, we apply force at one end. So while doing it, the other end acts like a fulcrum and the cap tries to turn around the fulcrum instead of opening. Thus the cap gets stuck.

Answered by  | 27th Mar, 2013, 09:42: PM

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