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Possible engine of train of mass 2.50 to 105 numbers 6 kg changes its velocity for 5 minutes seconds and 5 seconds in 5 minutes
From Work enrgy theorem,W = change in K.E.W = 0.5m(v^2 – u^2) = 0.5*2.5*10^5(25^2 – 5^2) =0.5*2.5*10^5(625 – 25) = 1.25*10^5*600 = 75 * 10^6 Joules. Now Power = > W/t = 75 * 10^6/5*60 = > 75 x 10^6/300 = > 25 x 10^4 Watts.
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