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CBSE Class 11-science Answered

Is it possible to open a pen cap with one finger ? Why ?
Asked by Saravanan | 02 Feb, 2015, 12:03: AM
answered-by-expert Expert Answer
Opening the cap of the pen requires two forces to be applied on it in opposite directions. These two forces will provide the necessary torque to overcome the friction between the cap and pen. Opening the cap with one finger will provide only one force, and the other force needed to produce the torque will be absent. So, it is not possible to open the cap with one finger.
Answered by Romal Bhansali | 02 Feb, 2015, 11:07: AM
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