Definition of Potential Energy
Introducing potential energy as the energy stored in an object due to its position or configuration in a conservative force field.
What is Definition of Potential Energy?
The energy possessed by an object by virtue of its position relative to others, stresses within itself, electric charge, or other factors.
Key formula / rule: Change in Potential Energy
Key points
- Define potential energy.
- Explain the relationship between potential energy and conservative forces.
- Identify situations where potential energy is relevant.
- Understand the concept of a reference point for potential energy.
Common exam trap
Confusing potential energy with kinetic energy.
Definitions
- Term
Potential Energy
- Meaning
The energy possessed by an object by virtue of its position relative to others, stresses within itself, electric charge, or other factors.
- Term
Conservative Force
- Meaning
A force for which the work done in moving an object between two points is independent of the path taken.
Learning objectives
Define potential energy.
Explain the relationship between potential energy and conservative forces.
Identify situations where potential energy is relevant.
Understand the concept of a reference point for potential energy.
Formulae
- Name
Change in Potential Energy
- Note
Where \(PEf\) is final potential energy, \(PEi\) is initial potential energy, and \(Wc\) is the work done by the conservative force.
- Expression
\Δ PE = PEf - PEi = -Wc
Prerequisites
Work and Energy
Conservative and Non-conservative Forces
Basic understanding of forces (gravitational, spring)
Common mistakes
Confusing potential energy with kinetic energy.
Incorrectly calculating the work done by the conservative force.
Forgetting to define a reference point for zero potential energy.
Applying potential energy concepts to non-conservative forces.
Keywords
Potential Energy
Stored Energy
Conservative Force
Gravitational Potential Energy
Elastic Potential Energy
Work-Energy Theorem
Practice preview
What is potential energy?…
easy
A spring is compressed. What type of energy is stored in the spring?…
easy
Which of the following is an example of potential energy?…
easy