What is work to be done to increase the velocity of a are from 36kmph to 72 kmph if mass of the car is 1500kg
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Explanation:
Work done = Change in mechanical energy
In thus case change in K.E.= Work
36kmph=10m/s , 72kmph= 20m/s
Change in K.E.=1/2(mv^2-mu^2)
=450kJ
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