Adrienne stiffened, her heart lurching into frenzied activity at the sound of his voice.
But if a load is so applied that the deflection increases with speed, the stress is greater than that due to a very gradually applied load, and vibrations about a mean position are set up. The rails not being absolutely straight and smooth, centrifugal and lurching actions occur which alter the distribution of the loading.
He drew his left foot out of the stirrup and, lurching with his whole body and puckering his face with the effort, raised it with difficulty onto the saddle, leaned on his knee, groaned, and slipped down into the arms of the Cossacks and adjutants who stood ready to assist him.
Cassie clung to the seat to keep from falling out of the lurching buggy as Bordeaux took them out of town at a run.