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    Solve Elastic Collision | 2kg Object Moving at 3m/s Hits Stationary 4kg Object

    Homework Statement An object of 2kg moving at 3m/s hits a 4 kg stationary object, causing the stationary object to begin moving at 0.5m/s. How fast is the original object now travelling? It is an elastic collision. Homework Equations Not really sure, 1/2mv^2 I presume. The...