What is the work to be done to increase the velocity of a car from 36 km/h to 72km/h if the mass of car is 1500 kg ?
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Given: initial velocity (u)=36km/hr=36x5/18=10m/s
Final velocity(v)=72km/hr=72×5/18=20m/s
Mass= 1500kg
Theory:work done =change in kinetic energy=potential energy
Formula:work done=1/2mv^2-1/2mu^2
Therefore, work done=1/2×1500(20-10)
=7500J
Dude, this was really easy for anyone who has read the theory of work power energy once
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