Question: A cylindrical steel bar is compressed by the application of forces of magnitude F at each end. What magnitude forces would be required to compress

A cylindrical steel bar is compressed by the application of forces of magnitude F at each end. What magnitude forces would be required to compress by the same amount
(a) A steel bar of the same cross-sectional area but one half the length?
(b) A steel bar of the same length but one half the radius?

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