what is the work to be done to increase the velocity of a car from 30km/h to 60km/h if the mass of the car is 1500kg
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Mass of car,m=1500 kg
Initial velocity of car=30km/hr
=30×1000÷60×60=8.33m/s=u
Similarly final velocity of car=60km/hr=16.67m/s.=v
Therefore,work done to increase velocity of car =1/2m(v²-u²)=1/2×1500×([16.67]²-[8.33]²)=156375J
Initial velocity of car=30km/hr
=30×1000÷60×60=8.33m/s=u
Similarly final velocity of car=60km/hr=16.67m/s.=v
Therefore,work done to increase velocity of car =1/2m(v²-u²)=1/2×1500×([16.67]²-[8.33]²)=156375J
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