Biomedical Engineering Reference
In-Depth Information
Exercise 7.3
elongation percentage
¼
0.00145 %.
10
4
m
Exercise 7.4
radius
¼
0.44
¼
44
μ
m.
10
5
N and
T
F
¼
10
4
N.
Exercise 7.5 T
M
¼
1.08
8.68
Exercise 7.6 v
¼
72 km/h.
Exercise 7.7
(a)
H
max
¼
Δ
t
¼
44 ms. Here, again, we have obtained a
fictional value, due to the value of the compressive strength of the calcaneus
(trabecular bone) presented by Yamada. The value does not represent the real
situation in which there is interference by muscle and articulations that are not
considered in the experimental measurements. If we consider that this bone has
the same property as the compact bone, concerning the strength, we obtain a very
reasonable value of
H
max
¼
1.0 cm; (b)
0.92 m and
Δ
t
¼
4.7 ms.
Exercise 7.8
(a) Average force
¼
9,900 N on the sole of the foot that touches the
ground; (b) Average force
990 N on the sole of the foot that touches the
ground. Observe how important it is to dampen the fall.
¼
