An elastic cord has an unstretched length of $L.$ When a mass of $75\mathrm{.}0$N hangs from it$,$ the length stretches to $61\mathrm{.}0cm\; ,$ and when a mass of weight $210.$N hangs from it$,$ the length is $85\mathrm{.}0$cm. Use this information to calculate the spring constant of this cord $($assuming it behaves like an ideal spring.$)$

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To calculate the spring constant we can use Hookes Law which states that the for... View the full answer