The Norden Bomb Sight manual

(5) • The instant the bomb is free of the plane its

forward motion begins to decrease because density

of the alr resists. its forward motion.

If this

were not true,

the forward speed of the

bomb would

remain the same as the forward speed of the plane

and the bomb would

remain directly beneath the

plane at all times.

(8) Air density also resists downward accelerat-

ion of bomb.

i.e.

i. e.

Without air resistance a falling

body accelerates at 32

feet per

second.