WAEC Physics 2018 Theory — Question 1

Question 1 of 27 from the West African Examinations Council (WAEC) Physics 2018 Theory paper, with the correct answer and a full explanation.

1.(a) Define Strain.

Model answer

Strain is the relative deformation produced by stress; it is the ratio of extension to original length, and has no units (dimensionless): strain = extension/original length.

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