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[" A block of mass "10kg" ,moving in "x"...

[" A block of mass "10kg" ,moving in "x" direction with a "],[" constant speed of "10ms^(-1)" ,is subjected to a retarding "],[" force "F=0.1times J/m" during its travel from "x=20m],[" to "30m" .Its final "KE" will be - "[" (A) "BMT-2015]],[" (A) "275J],[" (C) "475J," (D) "250J],[]]

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