Increases 69454

The car weighs 1850 kg and increases its speed from 27 to 81 km / h. How much has its kinetic energy increased?

Correct answer:

E =  416250 J

Step-by-step explanation:

m=1850 kg v1=27 km/h m/s=27:3.6  m/s=7.5 m/s v2=81 km/h m/s=81:3.6  m/s=22.5 m/s  E1=21 m v12=21 1850 7.52=4208125=52031.25 J E2=21 m v22=21 1850 22.52=468281.25 J  E=E2E1=468281.2552031.25=416250 J



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