what is the work to be done increase the velocity of a car from 30 km h-1 to 60km h-1 if the mass of the car is 1500kg?
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Work = Change in kinetic energy
= 0.5 m (v² - u²)
= 0.5 × 1500 kg × [(60 × 5/18 m/s)² - (30 × 5/18 m/s)²]
= 156250 joules
= 156.25 kJ
Work done is 156.25 kJ
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