Physical Science

If no friction acts on a diver during a dive, then which of the following statements is true?

A. The total mechanical energy of the system increases.
B. Potential energy can be converted into kinetic energy but not vice versa.
C. (KE+ PE)beginning = (KE + PE)end
D. all of the above

I think it's C.

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asked by Danny
  1. Yes, the answer is C, because KE + PE = A constant.

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    posted by Henry

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