Monday, February 24, 2014

A spring has a force constant of 525 N/m. A force of 375 N is applied to the spring. Find the elongation of the spring and its elastic potential...

Hello!


I suppose that the spring follows Hooke's Law:


`F=kx,`


where `F` is the force (it is given), `k` is the spring force constant (given also) and `x` is the length of the elongation or compression. Using this formula we can find the length of an elongation,


`x=F/k.`


Also it is known that for such a springs the elastic potential energy is equal to


`(kx^2)/2=(F^2)/(2k).`



Now perform the calculations.


For the first case, the...

Hello!


I suppose that the spring follows Hooke's Law:


`F=kx,`


where `F` is the force (it is given), `k` is the spring force constant (given also) and `x` is the length of the elongation or compression. Using this formula we can find the length of an elongation,


`x=F/k.`


Also it is known that for such a springs the elastic potential energy is equal to


`(kx^2)/2=(F^2)/(2k).`



Now perform the calculations.


For the first case, the elongation `x` is `F/k=375/525 approx 0.71(m).`
The elastic potential energy is `(375^2)/(2*525) approx 134 (J).`


For the second case, the elongation x is `F/k=350/525 approx 0.67(m).`
The elastic potential energy is `(350^2)/(2*525) approx 117 (J).`


There is no surprise that for the less force the elongation occurred to be less also, and the same is observed for the elastic potential energy.

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