Meaning & History. From a Germanic name meaning ruler of the army, composed of the elements wald rule and hari army. The Normans brought it to England, where it replaced the Old English cognate Wealdhere.A famous bearer of the name was Sir Walter Scott (1771-1832), a Scottish novelist who wrote 'Ivanhoe' and other notable works.eaning & History. From a Germanic name meaning ruler of the army, composed of the elements wald rule and hari army. The Normans brought it to England, where it replaced the Old English cognate Wealdhere.
In classical mechanics, impulse (symbolized by J or Imp) is the integral of a force, F, over the time interval, t, for which it acts. Since force is a vector quantity, impulse is also a vector in the same direction.Impulse applied to an object produces an equivalent vector change in its linear momentum, also in the same direction.he term impulse is also used to refer to a fast-acting force or impact. This type of impulse is often idealized so that the change in momentum produced by the force happens with no change in time.
Impulse also depends on how long the force is applied. More time, more impulse. Impulse is also directly proportional to the time for which the force is applied - twice as long means twice the impulse, three times as long means three times the impulse. So, the impulse exerted on an object depends directly on both how much force is applied and for how long the force is applied. Impulse is the product of the force and the time. Impulse = (force)(time) = Ft. Impulse is a vector quantity. It has the same direction as the applied force. The fact that impulse depends on both force and time means that there is more than one way to apply a large impulse to an object - you can apply a very large force for a reasonable time, or apply a regular force for a very long time (or both!).