Question

what is the work done to increase the velocity of a car from the 15 km per hour and 6 to 60 km per hour if the mass of the car is 1500 kg​

Answer 1

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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