What is the work to be done to increase the velocity of a car from 30 km/hr to 60 km/hr. Massa
car is 1,500 kg. (2)
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The work to be done is difference of Kinetic Energy
convert the speed
60kmph= 5/3 m/s
30kmph= 5/6 m/s
∆E= 1/2 mass× (difference of square of velocity)
work done= 1/2 × 1500 × (25/9- 25/36) J
= 750× 25/12 J
= 1562.5 J
J for Joule
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