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OpenStudy (anonymous):
The strength of a beam varies inversely as the cube of its length. The beam 3m long can support 920 kg. how much can a similar 7m beam ?
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OpenStudy (hba):
This is not the physics portion :/
OpenStudy (hba):
Close both os them up now.
OpenStudy (tkhunny):
This is a fine algebra problem. Strength Varies inversely with Length MEANS \(Strength = \dfrac{k}{Length}\) We are given \(920\;kg = \dfrac{k}{3\;m}\) Solve for 'k' and you are almost done.
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