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InterviewSolution
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As athlete in the olympic ganes cover a distance of `100 m` in `10 s`. Hiskinetic energy can be estrimated to be in the rangeA. ` 200 J - 500 J`B. `2 xx 10^(5) J - 3 xx 10^(5) J`C. `20000 J - 50000 J`D. `20000 J - 50000 J` |
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Answer» Correct Answer - D (d) The average speed of the athelete `nu= (100)/(10) = 10 m//s :. K.E = (1)/(2) m nu^(2)` If mass is `40 kg` then , K.E `= (1)/(2) xx 40 xx (10)^(2) = 20000 J ` If is `100 kg` then , K.E `= (1)/(2) xx 100 xx (10)^(2) = 50000 J` |
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