Biomedical Engineering Reference
In-Depth Information
Table 8.3
Force applied
to the association of rubber
strip spring scales in series
and the corresponding
variation in the length of the
association
F
(N or a.u.f.)
Δ
x
(m)
Fig. 8.12
Association of
three rubber strip spring
scales in parallel. Observe
that the three hooks should
be assembled to constitute
together a single hook
Table 8.4
Applied force to
the rubber strip spring scale
association in parallel and the
corresponding elongation of
the association
F
(N or a.u.f.)
x
(m)
Δ
calculated, the lengths of clips are canceled, with only the change in the length of
the rubber strips remaining.
5. Repeat the previous procedure for other values of mass and construct the
calibration curve for the association.
6. Compare the calibration curve of a single spring scale with that of the associa-
tion in series. What do you conclude?
Association in Parallel
7. Associate three spring scales in parallel as illustrated in Fig.
8.12
.
8. Measure the initial length,
x
o,
of the association without an applied force.
9. Submit the association to a known force and determine the elongation of the
association. Write the result in Table
8.4
.
10. Repeat the previous procedure for other values of mass and construct the
calibration curve for this association.
11. Compare the calibration curve of a single spring scale and that of the associa-
tion in parallel. What do you conclude?
12. Try to establish an analogy between this type of association and how muscle
fibers are grouped.
