Shearing applies force at right angles making material parts slip

Evidence

A shear displacement is what happens if you cut paper with scissors, or tear it. You are applying a force at right angles and making one part of the material slip, or shear, with respect to the other. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 111

Categorization

• DEFINE: Grounds abstract shear displacement in the familiar example of scissors cutting paper.
• CANDY: A quick, concrete image for recalling what shear means — good conversation material when explaining sound or materials.
• corroborated: 2 independent passages support this claim — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 111