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What is the work to be doneto increase the velocity of a car from30 km h1 to 60 km h1 if the mass ofthe car is 1500 kg? |
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Answer» 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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