Also in this case we may take
t=0
for the instant that the
pointlike object is launched vertically upward,
just when it leaves the floor of the train compartment.
Furthermore, we also in this case may take
the origin of our coordinate system
( x=0 , y=0 )
at the place where the pointlike object is launched vertically upward.
Hence,
r0x
= r0y
= 0
|
|
