Question

Dimensionally a surface force is defined as _____________

(a) force at a point

(b) pressure per unit area

(c) force per unit area

(d) force per unit volume

I got this question in an internship interview.

I want to ask this question from Elasticity topic in portion Elements of Elasticity of Geotechnical Engineering I

Answer 1

The correct choice is (c) force per unit area

Explanation: Surface forces are the forces distributed over the surface of the body. The surface forces are applied externally at boundaries of body. Hence, dimensionally a surface force is defined as force per unit area.