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A rock of mass 0.55 kg is thrown straight up with an initial speed of 14...

A rock of mass 0.55 kg is thrown straight up with an initial speed of 14 m/s. (Neglect air resistance.)

  1. What is the mechnical energy of the system?

  2. What is the potential energy of the rock when it reaches the highest point in its trajectory?

  3. How high is that highest point?

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