A vehicle traveling at a speed of 30 m/ s is accelerated to a velocity of 60 m/ s if the mass of the vehicle is 90 kg and each wheel weights 250 g. Calculate the change in kinetic energy of the vehicle
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Solution
Kinetic energy=1/2×m×v^2 initial k.E=1/2×90×30^2 Final K.E =1/2×90×60^2 Change in K.E=final K.E -initial K.E=1/2×90×[60^2 -30^2] =121500J=121.5kJ. dont get confused about considering mass of tyre.(moreover here no.of tyre or vehicle type is not specified.)