WAEC Physics 2018 Theory — Question 2

Question 2 of 27 from the West African Examinations Council (WAEC) Physics 2018 Theory paper, with the correct answer and a full explanation.

1.(b) A rubber band is stretched to twice its original length. Calculate the strain on the rubber band.

Model answer

Extension = 2l₀ − l₀ = l₀. Strain = extension/original length = l₀/l₀ = 1 (i.e. 100%).

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