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Ankit Kumar 8 years, 11 months ago
generally in physics we all have observed that some values were taken 0 during some derivation and solving numericals.
Actually this step taken by us is the assumption taken by us to simplify the complex terms whose solution is found to be difficult for even a common person to solve it.
we assume or compare only that angle of contact as 0 that is very very small on comparing with the other quantities which are very large on comparing with the angle. so in some numericals angle of contact is assumed to be zero
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