An-elastic-cord-can-be-stretched-to-its-elastic-limit-by-a-load-of-2N-If-a-35cm-lemgth-of-the-cord-is-extended-0-6cm-by-a-force-of-0-5N-what-will-be-the-length-of-the-cord-when-the-stretching-force-

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Question Number 15734 by chux last updated on 13/Jun/17

$$\mathrm{An}\mathrm{elastic}\mathrm{cord}\mathrm{can}\mathrm{be}\mathrm{stretched}\mathrm{to}$$$$\mathrm{its}\mathrm{elastic}\mathrm{limit}\mathrm{by}\mathrm{a}\mathrm{load}\mathrm{of}2\mathrm{N}.\mathrm{If}$$$$\mathrm{a}35\mathrm{cm}\mathrm{lemgth}\mathrm{of}\mathrm{the}\mathrm{cord}\mathrm{is}$$$$\mathrm{extended}0.6\mathrm{cm}\mathrm{by}\mathrm{a}\mathrm{force}\mathrm{of}0.5\mathrm{N},$$$$\mathrm{what}\mathrm{will}\mathrm{be}\mathrm{the}\mathrm{length}\mathrm{of}\mathrm{the}\mathrm{cord}$$$$\mathrm{when}\mathrm{the}\mathrm{stretching}\mathrm{force}\mathrm{is}2.5\mathrm{N}?$$$$\left(\mathrm{a}\right)350.8\mathrm{cm}$$$$\left(\mathrm{b}\right)352.8\mathrm{cm}$$$$\left(\mathrm{c}\right)353.0\mathrm{cm}$$$$\left(\mathrm{d}\right)356\mathrm{cm}$$$$\left(\mathrm{e}\right)\mathrm{cannot}\mathrm{be}\mathrm{determined}\mathrm{from}\mathrm{the}$$$$\mathrm{data}\mathrm{given}$$

Commented by mrW1 last updated on 13/Jun/17

$$\mathrm{what}\mathrm{is}\mathrm{the}\mathrm{length}\mathrm{of}\mathrm{the}\mathrm{cord}?35\mathrm{cm}$$$$\mathrm{or}350\mathrm{cm}?$$$$\mathrm{but}\mathrm{anyway},\mathrm{the}\mathrm{answer}\mathrm{is}\left(\mathrm{e}\right).$$

Commented by chux last updated on 13/Jun/17

$$\mathrm{in}\mathrm{the}\mathrm{textbook}\mathrm{its}35\mathrm{cm}$$

Commented by mrW1 last updated on 13/Jun/17

$$\mathrm{even}\mathrm{if}\mathrm{the}\mathrm{length}\mathrm{were}350\mathrm{cm},$$$$\mathrm{the}\mathrm{answer}\mathrm{is}\left(\mathrm{e}\right).\mathrm{after}\mathrm{the}\mathrm{elastic}\mathrm{limit}$$$$\mathrm{is}\mathrm{reached},\mathrm{the}\mathrm{length}\mathrm{change}\mathrm{of}\mathrm{cord}\mathrm{is}$$$$\mathrm{not}\mathrm{proportional}\mathrm{to}\mathrm{the}\mathrm{acting}\mathrm{force}.$$

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