The change in angle per unit of time. Its units is radians/sec.

The force associated with a body due to the action of an impulse on it. It is expressed as the product of the mass m of a body and its velocity v, i.e, mvkgm/sec in SI units. Impulse = Change in momentum, i.e Rt =mv₂ - mv₁. Where R is the resultant force on the body ant t the time R acts on the body.

The additional deformation or strain manifested over time in a load bearing body even though the body has not been subjected to additional stress

The velocity at which a body on the surface of the earth must travel out of the earth's atmosphere inorder not to fall back to earth. It is calculated as 8√R, where R is the radius of the Earth (4000miles).

The remaining stress when two of the [[principal stresses] are zero.

The two remaining stresses when one of the principal stressesis zero.

The stresses acting along three perpendicular directions that pass through a common point on the principal planes. One of these stresses is the maximum stress at this point and one is the minimum.

The three mutually perpendicular planes passing through any point in a load bearing body.

The line where the neutral surface intersects any given section of a member. Fiber stress is zero on the neutral axis.

A term sometimes used in place of longitudinal tensile or compressive stress.