Suppose that 2 J of work is needed to stretch a spring from its natural length of 30 cm

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Suppose that 2 J of work is 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?
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I love how he just solves thee problems and plugin in numbers without showing or explaining any of his work, to good!!!

dtalmood
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man just a little bit of effort and this would have been a fantastic example!

mikelanyon
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Why does the limit go from 0.05 to 0.1 on the 2nd part?

jcreatiga
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It's a good video, but you don't include any explanations

zEre
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When you are finding the K value and you took the integral of xdx, did you forget to square the .12? At about 48 seconds.

elizabethmcdaniel
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You realise you're supposed to be explaining right?

VarunKumar-dogk
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For anyone confused as to why he integrates in the beginning to find K, the difference I could find between the example problem and this one is that the example said (X amount of force is needed to hold a spring thats been stretched) and this problem says (X amount of force is needed to stretch a spring), so rather than simply holding the spring with the energy, the energy is for pulling back the spring.

Pigeater
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thank you! im finishing up my calculus semester right now and i've been struggling with the work problems, this helped me understand what im supposed to do~

incrediblake
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If the bounds are from 0.05 to 0.01, why did you plug in 0.1 instead? Bit confused how you got there.

bluepolarbear
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the 1/2 you crossed out is needed please check your work, the answer at the end is correct though

MrsSlayer
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Me and my friends spent half an hour on this, thank you

miscellaneouscam
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On your 4th line of writing, you missed the exponent on 0.12.

Crafty_Phoenix
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we meet again msolved tutoring. your videos are really helpful.
edit: also you are actually talking in this video kudos

mathadventuress