Question

What is the work to be done to increase the velocity of a car from 30 kmh to 60 kmh if the mass of the car is 1500kg

Answer 1

Work done increase the velocity of Car = change in Kinetic Energy W = 1/2 m ( v^2 - u^2) mass :: 1500 kg u= 30 km/h ( 30×5/18)m/s = 25/3 m/s v = 60km/h. ( 60×5/18) m/s = 50/3 m/s. plug- in equation these Value we get,W = (0.5) (1500) (625/9) (4-1) = 156250 J. = 156.25 J

Answer 2

plzz refer the attachment

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