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posted by Kizzy on Sunday, March 10, 2013 at 9:50pm.

How much work is required to stop a car that is 800.0 kg car that is traveling at 20.0 m/s?

(1/2) m v^2 = (1/2)(800)(400) = 16 * 100 * 100 = 160,000 Joules

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