physics
posted by Maria .
A spring has a length of 60cm when it unstretched. A load of 10N increases its length to 64 cm and a load of 20N increases its length to 68cm
a)what extension is produced by the 20N load?
b) What length would the spring have if a load of 15N were added to it?
c) Determine the force needed to produce an extension of 1cm

0 load and length 50 what is the extension
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