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The Brainliest Answer!
2016-02-26T10:13:05+05:30
Given, Kinetic energy=400 J Time, t=2 s Initial velocity, u=0 v=u+gt. =}v=0+10x2=20m/s K=1/2mv2=400 =} 1/2×m×400 = 400 =} m = 2 kg
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2016-02-27T22:12:39+05:30
Mass of the body will be 20 kg
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