If force acts during short interval of time dt, the linear impulse is
dt. If the force
acts from time t1 to time t2, the linear impulse is given by
Equation (7.3) can also be rearranged as
Equation (7.4) states that the linear momentum at time t1 plus the total impulse equals
to the linear momentum at time t2.
7.2.1 The Cotnponents of Linear Itnpulse
If Ʃ fx dt, Ʃ fy dy, Ʃ fz dt are the x, y, and z components of linea’ impulse, we can wdte
Ʃ fx dt = (mv x)2 – ( mv x) 2
Ʃ fy dt = (mv y)2 – ( mv y) 2
Ʃ fz dt = (mv z)2 – ( mv z) 2
The above three scalar equations can be applied independently.