What is the work to be done to increase to the velocity from 18km/h to 19km/h if the mass of the care is 2000kg?
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work done =0.5×mass×v×v-u×u
=0.5×2000×19×19-18×18
=0.5×2000×37
= 37000 J
=0.5×2000×19×19-18×18
=0.5×2000×37
= 37000 J
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