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How much work must be done on a 1 000-kg car to increase its speed from 1 m s to 2 m s?
Wiki User
∙ 9y ago
Kinetic energy = 1/2 M V2
At the lower speed, the car's KE is (500) (1)2 = 500 joules
At the higher speed, the car's KE is (500) (2)2 = 2,000 joules
The difference is the energy i.e. the work you have to put into it
to raise the speed from 1 m/s to 2 m/s.
(2,000 - 500) = 1,500 joules
Wiki User
∙ 9y ago
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