Praxis 5005 Practice Question
An object is lifted above the floor to a height X, as illustrated, and then released. Which of the following best describes the object's energy?
Correct Answer: B
Rationale: At height X, the object possesses potential energy due to its elevated position. As it falls, this potential energy is converted into kinetic energy, which increases as the object accelerates towards the ground.
Option A is incorrect because the object starts with potential energy, not kinetic. Option C incorrectly states that the energy is zero at height X; it actually has maximum potential energy. Option D, while acknowledging the conversion of energy, fails to mention that the total mechanical energy remains constant (neglecting air resistance), making it misleading. Thus, the correct understanding of energy transformation is captured in option B.
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