A block of mass 10 kg, moving in x-direc...

A block of mass 10 kg, moving in x-direction with a constant speed of `10ms^(-1)`, is subjected to a retarding force `F=0.1xxJ//m` during its travel from x=20 m to 30 m. Its final KE will be

250 J

475 J

450 J

275 J

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