A spring exerts a $13$NN$$force after being stretched by $3\mathrm{.}0$cmcm$$from its equilibrium length.

Part A

By how much will the spring force$$increase$$if the spring is stretched from $4\mathrm{.}5$cmcm$$away from equilibrium to $7\mathrm{.}5$cmcm$$from equilibrium?

Express your answer in newtons.

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$$F$$F$=$

nothing

NN