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GRAVITATION
Question #68647
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Question
How is work calculated when moving a mass from r1 to r2 against gravity in variable field?
A. W₁₂ = mg(r₂ – r₁)
B. W₁₂ = F × r
C. W₁₂ = –GMm (1/r₂ – 1/r₁)
D. W₁₂ = GMm (r₂ – r₁)
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