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You are standing on a large sheet of frictionless ice and are holding a large rock....

You are standing on a large sheet of frictionless ice and are holding a large rock. In order to get off the ice, you throw the rock so it has velocity relative to the earth of 12.4 m/s at an angle of 34.0 ? above the horizontal. If your mass is 74.0 kg and the rock's mass is 14.7 kg , what is your speed after you throw the rock?

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