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解物理: δΈ€δΈͺε•ζ‘†ηš„ζ‘†ι•Ώ l = 3.1 m。求θ―₯ε•ζ‘†ηš„ζŒ―εŠ¨ε‘¨ζœŸγ€‚(g = 9.8 m/sΒ²) β€” Detailed Solution | AhaStep