Calculating Stress Applied to Rubber Band: 1.0 MPa/ unit Strain

[Nubcake]

Rubber has roughly a stress of 1.0 MPa per unit strain . how much stress has been applied to the rubber band?



Stress = f/a



though it was straight forward and used the formula for stress but when I looked at the answer it was 2.0 x 10^6 Pa But why?

 

[PhanthomJay]

Your problem statement is missing info. It is just telling you what the E modulus is...stress over strain...or the stress in the rubber when it has extended to twice its original length. There can be no answer to the value of the stress without more data being given.