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12 kg द्रव्यमान के एक गोले को धरती से एक निश्चित ऊँचाई पर रखा गया | यदि निकाय की स्थितिज ऊर्जा 480 J है, तो गोले की धरती के सापेक्ष ऊँचाई ज्ञात करें | `(g=10" m"//"s"^(2))`

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दिया गया है कि
गोले का द्रव्यमान m = 12 kg.
निकाय की स्थितिज ऊर्जा `E_(p)=480" J"`,
गरुत्वीय त्वरण `g=10" m"//"s"^(2)`.
सूत्र `E_(p)="mgh"` से,
`h=(E_(p))/(mg)=(480" J")/(12" kg"xx10" m"//"s"^(2))=4" m"`.
अत: , गोले की धरती के सापेक्ष ऊँचाई 4 = m है |

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