a plane flying parallel to the ground with constant velocity releases a package before it is over a target on the ground. neglecting air resistance, which one of the following is not necessarily true? A. The package experiences a constant horizontal velocity.
B. The horizontal component of the package's velocity is the same as the plane's velocity.
C. The package accelerates vertically downward.
D. The vertical component of the package's velocity is the same as the plane's velocity.