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The force required to extend a rod increases as the cross sectional area
increases.
The rod that experiences the largest force is <u>rod B</u>
Reason:
The elongation of a rod by the application of a force is given by the
following formula;
From the above equation, we have that the elongation is inversely
proportional to the cross sectional area, such that the extension of a rod by
a given force reduces as the cross sectional area of the rod increases.
Therefore, the force required to extend the length of a rod by a specific
amount increases as the cross sectional area of the rod increases,
indicating that the rod with the largest cross sectional area require the
most force and therefore, experiences the largest force.
The rod that experiences the largest force is the rod with the largest cross
sectional area, which is <u>rod B</u>
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