Multiple Choice
How does energy transform from potential energy to kinetic energy in a system?
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9. Work & Energy
Intro to Energy & Kinetic Energy
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Which of the following statements about energy flow is true?
A
Kinetic energy is always greater than potential energy in any system.
B
Energy can be created or destroyed in an isolated system.
C
Energy can be transferred from one form to another, but the total energy remains constant.
D
Energy flow always results in a decrease in total energy.
Verified step by step guidance1
Begin by understanding the concept of energy conservation, which is a fundamental principle in physics stating that energy cannot be created or destroyed, only transformed from one form to another.
Consider the statement 'Energy can be transferred from one form to another, but the total energy remains constant.' This aligns with the law of conservation of energy, which is applicable to isolated systems.
Evaluate the statement 'Kinetic energy is always greater than potential energy in any system.' This is not universally true, as the relative magnitudes of kinetic and potential energy depend on the specific conditions of the system.
Analyze the statement 'Energy can be created or destroyed in an isolated system.' This contradicts the law of conservation of energy, which asserts that energy remains constant in an isolated system.
Review the statement 'Energy flow always results in a decrease in total energy.' This is incorrect because energy flow involves transformation and transfer, but the total energy in an isolated system remains constant according to the conservation principle.
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