A tensile force is applied to a rubber band that has not yet been stretched, so that it extends. The tensile force is then taken away. Which statement about the rubber band must be true?
- AIf the rubber band stretches elastically and plastically, all the work done by the force is converted to thermal energy in the rubber.
- BIf the rubber band stretches elastically, it obeys Hooke’s law.
- CIf the rubber band stretches elastically, the gradient of the force-extension graph represents the work done by the force.
- DIf the rubber band stretches plastically, the rubber band will be longer after the force is removed than it was before the force is applied.