927 
48 ot, —>0 , wt, —>R- Perform the following trigonometric substitution: 
2F, SF 
h =F, \/1 - 
zg 2 
F 
2 
(1 = cos at.) 
AF sin at, 
ot, 
Fy, + AF cos at, 
(Fy + AF cos at, )® - AF sin® at, 
(1 - cos wt.) 
. A F® sin® at, (144) 
ar fF 
7/2 - eae (1 = cos wt,) 
Fg 
4s wt, —>0, y=; 
To eheck Eqe (I-44): 
4F—o, me domes a 
at, —>N 5 55? Ss 
For the special case Fp = 2F, (normal reflection from a rigid surface), 
Eqe (I-44) becomes: 
-112- 
