Elastic Potential Energy
Explanation
Energy is the capacity to do work. Mechanical energy is primarily classified into Kinetic Energy (associated with motion) and Potential Energy (associated with position or configuration). When an elastic object is deformed, work is done against the internal restoring forces, and this energy is stored within the system.
Option Analysis
- Kinetic Energy is incorrect: Kinetic Energy is the energy possessed by an object by virtue of its motion. A wound-up spring is in a static state of tension and is not moving; therefore, it does not possess kinetic energy until it is released.
- Elastic Potential Energy is correct: Elastic Potential Energy is the energy stored in an object due to a change in its shape or configuration (deformation). When a spring is wound up, work is done to change its configuration. This work is stored as elastic potential energy, which drives the toy car when released.
- Gravitational Potential Energy is incorrect: Gravitational Potential Energy is the energy stored in an object due to its vertical position or height relative to a reference level (e.g., the surface of the Earth). The energy in the spring arises from mechanical deformation, not elevation.
- Chemical Energy is incorrect: Chemical Energy is energy stored in the bonds of chemical compounds, such as in batteries or fuel. The energy in a spring is mechanical, not chemical.
Key Takeaway
Elastic Potential Energy is the potential energy stored as a result of the deformation of an elastic object, such as the stretching of a spring or the drawing of a bow.