As a continuation of our previous work on the multi-body forces of D-partic
les in supergravity and Matrix theory, we investigate the problem of motion
. We show that the scattering of D-particles including recoil derived in Ma
trix theory is precisely reproduced by supergravity with the discrete light
-cone prescription up to the second order in Ii-dimensional Newton constant
. An intimate connection of recoil and Galilei invariance in supergravity i
s pointed out and elucidated. (C) 1999 Elsevier Science B.V.