Unit impulse.

Description
Weight function and transfer function are discussed with example. From this module it is clear that In the s-domain, the system response is obtained by multiplying by the transfer function. Unit input signals are explained. The impulse of a variable force acting for certain time is calculated as per the physicists. There is a sudden very brief very intense force, rather like getting hit on the head by a hammer. The effect is to increase the momentum instantaneously, without changing the position. Under such conditions when the momentum increases by 1, then it is known as a unit impulse.
Prof. Arthur Mattuck, Maths, 18.03.Differential Equations, Spring 2010: 22: Use with Impulse Inputs: Massachusetts Institute of Technology: MIT Open Course Ware),http://ocw.mit.edu (Accessed November24, 2011). License: Creative Commons BY-NC-SA: http://ocw.mit.edu/terms/#cc