What is the work to be done to increase the velocity of car from 30km/h to 60km/h if the mass of body is 30kg
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3125J
Explanation:
Work = Change in kinetic energy (Work - Energy Theorem)
= 0.5 m (v² - u²)
= 0.5 × 30 kg × [(60 × 5/18 m/s)² - (30 × 5/18 m/s)²]
= 0.5 x 30 x 25/324 ( 3600 - 900)
= 0.5 x 30 x 25 x 2700 / 324
= 3125J
Work done is 3125J
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