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tranngocyen1999

[TEX]v_{max}^2[/TEX] =[TEX]v^2[/TEX] +([TEX]a^2[/TEX].[TEX]A^2[/TEX])/([TEX]20^2[/TEX])
=> A = 10[TEX]\sqrt{2}[/TEX] (cm)
 
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