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A vertical spring has a length of 0.15 m when a 0.225 kg mass hangs from...

A vertical spring has a length of 0.15 m when a 0.225 kg mass hangs from it, and a length of 0.725 m when a 1.875 kg mass hangs from it.

a. What is the force constant of the spring, in newtons per meter?

b. What is the unloaded length of the spring, in centimeters?

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