When traveling by car...seek shelter under an overpass as a tornado approaches. Fact : Seeking shelter under an overpass is more dangerous than standing in an open field while a tornado is approaching. When a tornado passes over an overpass, winds are funneled under the bridge thereby increasing the velocity. The same phenomena can be experienced by standing between two buildings on a windy day.
exists and is an alternate of . A linear foot is a straight-line measurement, rather than a sqare-foot measurement. A 2x4 that is five feet long would be five linear feet. Moreover, since a square is measured by its perimeter, a 5x5 square would be 20 linear feet (5+5+5+5).
stride length the distance between the position (e.g. heel contact) of one foot and the subsequent position of the same foot. May also include other support devices such as crutches. Should be the same for each foot as long as movement is in a straight line (i.e. not in a curve).