what is the work to do to increase the velocity of car from 18 kilometre per hour to 90 km per hour if the mass of the car is 2000 kilogram
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Work = Change in kinetic energy
= 1/2 m (v² - u²)
= 1/2 × 2000 kg × [(90 × 5/18 m/s)² - (18× 5/18 m/s)²]
= 1000*(625-25)
=1000*600
=600000 joule
= 600KJ
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