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8. A body of mass m 10 kg is moving in a medium and experiences a frictional force F--kv. Its intialspeed is vo = 10ms". I, after los, its energy is-mg,the value ofk will be :-(1) 10 kg m (2) 10 kg m ' (3)10 kg m (4) 10[JEE-Main-2017]kg s" |
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