Asked by Misaki

It takes 6.7 J of work to stretch a spring 4.4 cm from its unstressed (relaxed) length.
How much work (in J) is needed to compress the spring an additional 3.8 cm?
I found the spring potential energy to be 6.7 J, and the spring constant to be 6921.5. I thought that plugging those in the the spring potential energy equation would give me the right answer, but it's not. Help?
Answered by Henry
Work = F*d = 6.7 J.
F * 0.044 = 6.7
F = 152.3 N

F/(0.038+0.044) = 152.3/0.044
F/0.082 = 3461.36
F = 283.83 N.

Work = F*d = 283.83 * 0.082 = 23.3 J.

23.3 - 6.7 = 16.6 J.





Answered by Bill
Your answer is wrong
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