3B SCIENTIFIC PHYSICS 1018466 사용 설명서 - 페이지 3
{카테고리_이름} 3B SCIENTIFIC PHYSICS 1018466에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. 3B SCIENTIFIC PHYSICS 1018466 5 페이지.
페이지 인쇄3. Description
The reversible pendulum is a physical pendulum
with two bearing fulcra plus one fixed and one
movable pendulum bob. It oscillates in its stand
either with a period of oscillation T
bearing fulcrum or period T
crum. By shifting the movable pendulum bob it is
possible to adjust both these periods until they
are equal. The pendulum then has a reduced
length equal to the distance d between the bear-
ing axes and the following equation applies:
d
g: acceleration due to gravity
T
T
2
,
1
2
g
When it is moved, the movable weight latches
into place every 2.5 cm. For finer movements the
bob can be turned by 180° about the vertical and
mounted that way round.
4. Technical data
Period of calibrated
pendulum (calculated
assuming g = 9.81 m/s
Overall dimensions:
Overall weight:
Length of pendulum rod:
Separation between
bearing fulcra:
Fixed pendulum bob:
Movable pendulum bob:
Pendulum deflection
5. Set-up
5.1 Choice of set-up location
If the floor on which the equipment is set is
springy, then the oscillation energy is transferred
to the whole stand and measurement errors can
then arise.
Only set up and use the reversible pendulum
on solid, level ground.
On smooth, slippery or sensitive surfaces:
Put a mat under the base plate and the strut
of the stand.
5.2 Assembly of stand
Undo the screw (see Fig. 1), fold out the
stand rod.
Secure it in its operating position with a mod-
erate degree of torque.
about the first
1
about the second ful-
2
2
):
1794 ms
80x125x30cm
6.3 kg approx.
120 cm
80 cm
1.4 kg approx.
1.0 kg approx.
max. 10 cm
Fig. 1: Attachment of stand rod to stand board
5.3 Vertical positioning of the pendulum rod
Grip the pendulum with both hands and care-
fully suspend it from the bearing plate (see
Fig. 2).
The vertical positioning of the pendulum rod
should be adjusted using the positioning
screws in such a way that the bubble of the
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spirit level is centered (see Fig. 3).
Fig. 2: Bearing plate with pendulum rod suspended
Fig. 3: Setting position with the help of the spirit level
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