Biomedical Engineering Reference
In-Depth Information
y (cm)
70
60
W thigh
50
C.G.
40
W leg
30
20
W foot
10
0
0 0 0 0 0 0 0 0
x (cm)
Table of Example 3.4
Coordinates of C.G.
x (cm)
Parts of body
y (cm)
Thigh
17.3
51.3
Leg
42.5
32.8
Foot
45.0
3.3
ð
0
106 M
Þ
17
3
þ
ð
0
046 M
Þ
42
5
þ
ð
0
017 M
Þ
45
0
:
:
:
:
:
:
x C : G : ¼
,
ð
0
106
þ
0
046
þ
0
017
Þ
M
:
:
:
x C.G. ¼
26.9 cm.
ð
0
106 M
Þ
51
3
þ
ð
0
046 M
Þ
32
8
þ
ð
0
017 M
Þ
3
3
:
:
:
:
:
:
y C : G : ¼
,
ð
0
106
þ
0
046
þ
0
017
Þ
M
:
:
:
y C.G. ¼
41.4 cm.
Exercise 3.6 Locate the center of gravity of the set thigh/leg/foot of Example 3.4
in the standing posture. The x C.G. coordinates of each part are, respectively,
42.5 cm, 42.5 cm, and 45.0 cm, and the y C.G. coordinates 76.6 cm, 32.8 cm, and
3.3 cm.
Exercise 3.7 Consider the following simulation of a human body with regular
geometric shape and suppose that this is your body. Table 3.1 gives the approximate
percentage mass of each part of the body. Represent the center of gravity of each
part at its geometric center and find the coordinates of the simulated center of
gravity using Fig. 3.9 . Consider your height and total mass. To measure the
coordinates ( x , y , z ) of the center of gravity about the origin of the system of
Search WWH ::




Custom Search