Question

If a boy and a girl run with same velocity and the mass of boy is 20 times more than that of a girl then find the ratio of their kinetic energy



Plzzzzzzzzzzzzz ans fast
I have my paper tomorrow

Answer 1

see the image for the answer

Answer 2

let the mass of the girl be m 

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then the mass of boy = 20 m 


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velocity ( V ) 

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K. E boy / K. E girl   = 1 / m ( 20 m ) v ^ 2 / 1/ 2 ( m ) v ^ 2 



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K. E boy 

      = K. E girl - 20 : 1 
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