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A bolck of mass 10 kg is moving in x-dir...

A bolck of mass `10 kg` is moving in x-direction with a constant speed of `10 m//s`. it is subjected to a retardeng force `F=-0.1 x J//m`. During its travel from `x =20m` to `x =30 m`. Its final kinetic energy will be .

A

475 joules

B

450 joules

C

275 joules

D

250 joules

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The correct Answer is:
A
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