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Ballistics, 2nd Edition
book

Ballistics, 2nd Edition

by Donald E. Carlucci, Sidney S. Jacobson
August 2013
Intermediate to advanced content levelIntermediate to advanced
608 pages
21h 36m
English
CRC Press
Content preview from Ballistics, 2nd Edition
210 Ballistics: Theory and Design of Guns and Ammunition
Now, if we examine the particle as moving in two dimensions only, we can break its motion
up into two components, one parallel to and one perpendicular to the position vector, r
(Figure 7.8). The position vector written in this coordinate system is given by
re= r
r
(7.28)
So from our denition for the velocity in Equation 7.26, we get
v
r
e
e
== +
d
d
d
d
d
dt
r
t
r
t
r
r
(7.29)
Since e
r
is a unit vector (its magnitude is a constant = 1) the only thing that changes with
time is its direction.
This introduces the concept of curvilinear motion with radial coordinates, (r, θ). The
direction is dened by the angle, ...
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Publisher Resources

ISBN: 9781466564374