PHYSICS

a 10cm long spring is attached to the ceiling. when a 2.6kg mass is hung from it, the spring stretched to a length of 15cm.

what is the spring constant k
how long is the spring when a 4.0 kg mass is suspended from it

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1. k= 2.6*9.8/.15 N/m

how long? x= F/k=4*9.8/above meters

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2. k=2.6*9.8/.05 N/m Make sure you take the difference of the stretched string versus the one without any weight.

How long should be x = 4*9.8/k

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