2 years ago

Find the magnitude of the force at point x = 15cm if k=10500 N/m when the work done by this force is WD= 1/2k x2

Physics

1 answer:

Ann [662]2 years ago

6 0

Answer:

sqdqk3

Explanation:

qdjqưbdkq ưqdhud j

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Explanation:

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$\frac{dF}{dt}=\frac{k}{r^{2}}\\\frac{dF}{dt}=k*r^{-2}\\\frac{dF}{dt}=-2*k*r^{-3} \frac{dr}{dt}\\\frac{dF}{dt}=\frac{-2k}{r^{3}}\frac{dr}{dt}$

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$V=\frac{dr}{dt}=0.4 \frac{km}{s}$

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