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A 0.25kg cart travelling at 3.0 m/s collides with and sticks to a .125 moving with an unknown speed and direction on a level track.

A 0.25kg cart travelling at 3.0 m/s collides with and sticks to a .125 moving with an unknown speed and direction on a level track. They move off together and stop at a vertical height of .142m What was the original speed and direction of the 125 cart.

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