Suppose that 2 J of work are needed to stretch a spring from its natural length of 30 cm to a length of 42 cm.
How much work is needed to stretch it from 35 cm to 40 cm?

Question

Suppose that 2 J of work are needed to stretch a spring from its natural length of 30 cm to a length of 42 cm.
How much work is needed to stretch it from 35 cm to 40 cm?

bradely · Answer

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anonymous · Answer

@bradely when i try and submit that answer, it shows that 868 is incorrect. plus my professor wants us to use integrals, which i also figured out, $$\int\limits_{.35}^{.4}46.24629( x) \space dx$$ this comes out to the same answer, roughly, but is still not correct. I will ask to find out how to solve this problem in class today.