Physics Unit9: Static Equilibrium, Elasticity and Fracture (id: 19e68d9fe)

本题目来源于试卷: Physics Unit9: Static Equilibrium, Elasticity and Fracture，类别为 国际高中通用物理

[单选题]
Stress is

A. the strain per unit length.
B. the same as force.
C. the ratio of the change in length.
D. applied force per cross-sectional area.


参考答案:  D


本题详细解析: 暂无

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