Imagine holding a mic at a height above the ground. It is released and falls toward the ground.

Ignoring air resistance or friction, which of the following must be true?

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a. Before it falls, all of its energy must be potential energy
b. At the end of its fall, all of its energy must be converted to kinetic energy
c. During its fall, the combination of its kinetic and potential energy must equal the amount of potential energy with which it started
d. Total energy = Kinetic Energy + Potential Energy
e. All of the above

e. All of the above