use the applet embedded or
the jar file;topic=745.0;attach=372

u = 141 m/s
alpha = 45 degree

select from menu to visualize the quality
ux =
vx =

click play

what do you notice about the vx (instantaneous velocity in x direction ) ?

hint: vx = 100 m/s
extra fact: notice vx = 100 m/s = ux (initial velocity in x direction) because it is a motion in x direction without any acceleration ( ax )  so it is unchanged :)