# A spring has a natural length of 26 cm. If a 21-N force is required to keep it stretched to a length of 30 cm, how much work W is required to stretch it from 26 cmto 28 cm? (Round your answer to two decimal places.)

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23 views help_outlineImage TranscriptioncloseA spring has a natural length of 26 cm. If a 21-N force is required to keep it stretched to a length of 30 cm, how much work W is required to stretch it from 26 cm to 28 cm? (Round your answer to two decimal places.) fullscreen
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Step 1

We know that F(x)=kx , where k=constant.

From 26 cm to 30 cm , distance is (30-26)=4 cm = 0.04 m

For x= 0.04m , force needed = 21 N

Using this we find k. So, F(x)= 525x

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