A rectangular solid is subjected separately to three kinds of loading. In case I, equal and opposite forces act normally outward on two opposite faces. In case II, equal and opposite forces act normally inward on two opposite faces. In case III, equal and opposite forces act tangentially on two opposite faces. Which statement is correct?
Options

Question

A rectangular solid is subjected separately to three kinds of loading. In case I, equal and opposite forces act normally outward on two opposite faces. In case II, equal and opposite forces act normally inward on two opposite faces. In case III, equal and opposite forces act tangentially on two opposite faces. Which statement is correct?

Options

G1 Physics · Accepted Answer

A normal force pulling a body outward produces tensile stress. A normal force pushing the body inward produces compressive stress. A force acting tangentially to a face produces shear stress. Therefore, Case I → tensile stress, Case II → compressive stress, Case III → shear stress. Correct option: B.