PASCO ME-6844 Parallel Spring Bracket - Manual (Page 2)

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P a r a l l e l S p r i n g B r a c k e t M E - 6 8 4 4
2
Set-up
1. Assemble the suspension bracket, a
large table clamp and a rod as illus-
trated. The table clamp (rather than a
base) and a relatively short rod are
recommended for maximum stabil-
ity.
2. Hang any combination of springs
from the suspension bracket.
3. Attach the parallel hook bar to the
bottom of the spring combination.
4. Hook a mass onto the notched slot of
the parallel hook bar. The mass should be large enough to
stretch all springs at least slightly.
5. Move the mass left or right along the notched slot to find the
position that makes the hook bar as close to horizontal as
possible.
6. Check that all springs are stretched. You should be able to
see between the coils of every spring. If one of the springs is
not stretched, increase the hanging mass.
Sample Configurations
Single Spring
Though the hook bar is not necessary to
attach a mass to a single spring, it does
provide a convenient point from which to
measure changing displacement.
Two Parallel
Two springs (10 N/m and 40 N/m) from
the Series/Parallel Spring Set (ME-6842)
are combined in parallel. The hanging
mass is placed off center to make the
hook bar level.
Three Parallel
Three different springs (40 N/m, 20 N/m,
and 10 N/m) from the Series/Parallel
Spring Set are combined in parallel.
Series
Two springs are linked end-to-end to
form a series combination.
Series and parallel
Two short springs from the Series/Paral-
lel Spring Set are linked in series. That
combination is in parallel with a single
long spring from the Equal Length Spring
Set (ME-8970). When not stretched, the
long spring is twice the length of each of
the short springs.