All changes saved 17. Answer the question below. Use the rubric in the materials for help if needed.
m
A rock with a mass of 2 kg is falling from a cliff. At one point as it is falling, its velocity is 10 -. At this same point, its
potential energy is 300 J. What is the mechanical energy of the rock? Describe how to determine this energy. Use
details to support your answer.
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Describe the path of a ray that approaches a mirror parallel to the principal axis.

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?

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