i added a picture of the problem!(adsbygoogle = window.adsbygoogle || []).push({});

when the body is at point A the spring

is in relaxed status.

it lengths in relaxed statues is 0.6m

then a power P =20N is pulling the body to point B AB=0.25m

i was asked what is his speed when it reaches point B

so i made an equation that the total work equals the energy in the end

minus 0 (because there were no energy at the start)

i got that the speed of the body is square root of 15

v=3.87m/sec

the power P stops working a point B permemantly.

now i am being asked

what is the minimal distance that that body will get to the wall?

i tried to do the equation the bodies kinetic enrgy equals to its spring potential energy

it doesnt work i get that the amplitude is longer than 0.6m (not possible)

plz help

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# Homework Help: A question on springs energy

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