Question: Two solid rods are made of the same material and have the same cross-sectional areas, and their lengths differ by a factor of two. If

Two solid rods are made of the same material and have the same cross-sectional areas, and their lengths differ by a factor of two. If a compressive force F is applied to both, what is the ratio of their changes in length?
(a) The longer rod changes length by more, by a factor of two.
(b) The shorter rod changes length by more, by a factor of two.
(c) The lengths change by the same amount.

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