physics

If a boat and its riders have a mass of 800 kg and the boat drifts in at 1.5 m/s how much work does Sam do to stop it?

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asked by sam
  1. (1/2) m v^2 = 400(2.25) Joules

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    posted by Damon
  2. but do not forget the answer is negative

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    posted by Kelsey

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