The diagram shows a stress-strain graph for a rubber band. Consider of the following statements. I. It will be easier to compress this rubber than expand it. II. Rubber does not return to its original length after it is stretched. III. The rubber band will get heated if it is stretched and released. Which of these can be deduced from the graph
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Question

The diagram shows a stress-strain graph for a rubber band. Consider of the following statements. I. It will be easier to compress this rubber than expand it. II. Rubber does not return to its original length after it is stretched. III. The rubber band will get heated if it is stretched and released. Which of these can be deduced from the graph

Options

G1 Physics · Accepted Answer

Use stress σ=F/A, strain ε=ΔL/L and Young's modulus Y=σ/ε. For a uniform segment, ΔL=FL/(AY); for thermal restraint, thermal strain αΔT produces stress YαΔT. Evaluating the given data/statements gives A: III only. Therefore the correct answer is A.