A body of mass 2 kg is thrown up vertically with K.E. of 490 joules. If the acceleration due to gravity is 9.8 m/ sq. sec, then the height at which the K.E. of the body becomes half its original value is

Options :
  1. 30 m
  2. 20 m
  3. 12.5 m
  4. 10 m

Answer and Explanation :-

Answer: Option 3


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