3B SCIENTIFIC PHYSICS 1018466 Manual De Instrucciones página 10

6.4 Determination of acceleration due to
gravity
The periods of oscillation T
at the two points where the curves intersect and
at these points they are equal to the period of os-
cillation T of the calibrated pendulum, i.e.
0
T = T = T .
0 1 2
From the period duration T
for a calibrated reversible pendulum and a dis-
tance l = 0.8 m between the two fulcra, corre-
sponding to the shortened pendulum length, it is
possible to determine the acceleration due to
earth's gravity:
l
   
2
g 4 .
2
T
0
Note: To adjust the pendulum so that both peri-
ods of oscillation are exactly the same, it may be
necessary to turn the pendulum bob by 180°
about the vertical and mount it on the pendulum
rod that way round.
Fig. 6: Period of oscillation T as a function of measuring point number n. Red circles: Both pendulum bobs below
fulcrum. Black squares: Fixed pendulum bob above fulcrum, movable bob below
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and. T are identical
1 2
measured in step 6.3
0
Technical amendments are possible
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7. Storage, cleaning, and disposal

Keep the apparatus in a clean, dry, dust-free
place.

Do not use aggressive cleaning agents or sol-
vents to clean the apparatus.

In order to clean the equipment, use a soft,
damp cloth.

The packaging should be disposed of at local
recycling centres

If the equipment itself is
to be disposed of, it
must not be included
with normal household
waste. Local regula-
tions are to be obeyed.