what is the work to be done to increase the velocity from 18 km per hour to 90 km per hour if the mass of the caries 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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