Entry Exam Category: Graduate & Professional Program Admission Exams
Course: Praxis
Exam: Praxis Elementary Science 5005 Practice Test
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?
Answer Choices
- A: At height X, the energy is kinetic and changes to potential as the object falls.
- B: At height X, the energy is potential and changes to kinetic as the object falls.
- C: At height X, the energy is zero and the object gains both kinetic and potential energy as it falls.
- D: At height X, the energy is potential and the object gains kinetic energy as it falls, while its potential energy decreases.
Correct Answer: B
Rationale: At X: potential, falls to kinetic. A: Reversed. C: Not zero. D: Correct but B precise conversion.