The mass of the string was included in the total mass, but not in the unbalanced
ID: 2030871 • Letter: T
Question
The mass of the string was included in the total mass, but not in the unbalanced force, even though there is sometimes more string on one side of the pulley than in the other. Why is it valid to ignore the mass of the string in the unbalanced force?The mass of the string was included in the total mass, but not in the unbalanced force, even though there is sometimes more string on one side of the pulley than on the other. Why is it valid to ignore the mass of the string in the unbalanced force? The mass of 3. the String is munN K mrpared fo the total, mast duding
Explanation / Answer
Since mass of string is very small compared to the total mass.
If we consider the mass of string,then tension in string would not be uniform.
And in that case,we'd have to calculate tension by integration and
the whole process would become complex with very little change in answer.
so Its valid to ignore the mass of chord.
Actually, if we want to take the mass of string into consideration, then we
can do so. But the result which we will get will be much slightly different
from the result when we don't consider the mass of string. Also the process of
calculation would become much tedious.
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