The work done needed to stretch the rubber band

The heat energy produced in the rubber band

The energy used to contract the rubber band

The spring constant of the rubber band

The material does not obey Hooke's Law

The material experiences plastic deformation when a load is applied

The material experiences elastic deformation when a load is applied

The material does obey Hooke's Law

becomes temporarily deformed

loses elastic potential energy

becomes permanently deformed

gains kinetic energy

The energy is 'lost' because the material temporarily changes state to a liquid then back again

The energy is 'lost' as heat to the surroundings

The energy 'lost' is being used to vibrate the atoms in their positions

The energy 'lost' is being used to reposition the atoms

$$\sigma=\frac{F}{A}$$  

$$\sigma=FA$$  

$$\sigma=\frac{\Delta x}{x}$$  

$$\sigma=\Delta xA$$  

The spring constant of the material

The force per unit area

The elastic strain energy per unit volume

The Young's Modulus

$$\epsilon=\frac{F}{A}$$  

$$\epsilon=FA$$  

$$\epsilon=\frac{\Delta x}{x}$$  

$$\epsilon=\Delta xA$$  

$$YM=\frac{Stress}{Strain}$$  

$$YM=\frac{FA}{x\Delta x}$$  

$$YM=\frac{Fx}{A\Delta x}$$  

$$YM=\frac{F\Delta x}{Ax}$$  

A

B

D

E

Steel

Glass

Copper

Steel

Glass

Copper

Steel

Glass

Copper