What is the work to be done to increase the velocity of a car from 36 kilometre per hour to 72 km per hour if the mass of the car is 1500 kg?
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This question does not belong to the subject music ok.
It is math
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- m = 1500 kg
- u = 36 km h⁻¹ = 10 m s⁻¹
- v = 72 km h⁻¹ = 20 m s⁻¹
- W = ?
Work done = Change in kinetic energy
= 1/2 m (v² - u²)
= 1/2 x 1500 x (20² - 10²)
= 225000 J
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