The type of energy stored in a stretched rubber band is called .

The type of energy stored in a stretched rubber band is called elastic potential energy.

When a rubber band is stretched or compressed, its shape changes temporarily. This deformation causes the molecules inside the rubber band to be displaced from their equilibrium positions. The energy stored due to this deformation is known as elastic potential energy. It is a form of potential energy because it depends on the position (stretched or compressed state) of the object rather than its motion. This energy is released when the rubber band returns to its original shape, often seen as kinetic energy (e.g., when a rubber band is released and flies forward). Elastic potential energy can be calculated using the formula:

$$E=\frac{1}{2}k{x}^2$$

where $E$ is the elastic potential energy, $k$ is the spring constant (or force constant) of the rubber band, and $x$ is the displacement from the equilibrium position.