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Forensic Engineering Fundamentals
book

Forensic Engineering Fundamentals

by Harold Franck, Darren Franck
December 2012
Beginner to intermediate content levelBeginner to intermediate
487 pages
17h
English
CRC Press
Content preview from Forensic Engineering Fundamentals
242 Forensic Engineering Fundamentals
In the earlier equations, g is the acceleration due to gravity, t is the time, and θ is the
angle of departure of the projectile relative to the reference plane. Equations 9.22 and
9.23 produce the trajectory in terms of time t. Eliminating t from the earlier equations,
we obtain
zx
gx
v
=−tan
cos
θ
θ
2
0
22
2
(9.24)
Equation 9.24 can be solved for the departure velocity given by
v
gx
xz
0
2
2
2
=
cos(ta
n)θθ
(9.25)
A special case of projectile motion occurs when an object falls freely. In terms of the coor-
dinate system utilized in the previous discussion, Equation 9.12 may be written as
zz vt at=+ +
00
1
2
2
(9.26)
but z
0
= v
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Publisher Resources

ISBN: 9781439878392