What is the work to be done to increase the velocity of a car from 30 km h–1
to 60 km h–1
if the mass of the car is 1500 kg? (3)
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By work energy theorem
W net is the change in kinetic energy.
so work done = 1/2mv²-1/2mu²
W=1/2×1500(50²/3²-25²/3²)
156187 J
Hope the calulation is correct..I am a bit weak at calculation..;) but the concept is very true
hope u get it
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