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[" The potential energy of a "],[" parti...

[" The potential energy of a "],[" particle of mass "m" is "],[" given by "^(U=(1)/(2)kx^(2))" for "x<0],[" and "U=0" for "x>=0" .If total "],[" mechanical energy of the "],[" particle "s" ."[" Then its "],[" speed at "x=sqrt((2E)/(k))" is "],[" zero "],[qquad sqrt((2E)/(m))],[sqrt((E)/(-))]]

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