3B SCIENTIFIC 1008539 Instrucciones De Uso página 4

4. Operation
4.1 Assembly of the apparatus
•
Slide the scale holder with the scale itself to
the middle of the stand rod and secure it in
place with a screw.
•
Set up the stand rod on the stand base and
secure it in place with the screw.
•
Attach the holder with the ball bearing to the
stand rod and secure it in place with its
screw.
• Attach the pointer to the lever arm.
•
Attach the lever arm and pointer to the lever
arm attachment using the knurled nut.
•
Adjust the scale such that the end of the
pointer is aligned with the bottom of the
scale markings.
•
Slide the balance weight along the arm to
make sure the arm is balanced.
Fig. 1 Assembly of the lever
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5.1 Verify the law of levers using the two-
•
•
•
The lever is in a state of equillibrium.
•
G
Fig. 2 Two-arm lever
5.2 Verify the law of levers using the single-
Additionally required:
One dynamometer 2 N, 5 N and 10 N each (e.g.
1003105/1003106/100317)
•
•
•
•
In this experiment the weight of the lever arm
must be taken into consideration (0.458 kg cor-
responds to 4.49 N).
Fig. 3 Single-arm lever
Subject to technical amendments
© Copyright 2013 3B Scientific GmbH
5. Sample experiments
arm lever
Fasten the lever arm in the middle of the ball
bearing.
Hang 5 50 g weights (each approx. 2.5 N)
on the left side of the lever arm in the third
bore hole from the center.
Hang 3 50 g weights (each approx. 1.5 N)
on the right side of the lever arm in the fifth
bore hole from the center.
Repeat the experiment using other weight
combinations.
0
arm lever
Fasten the lever arm to the ball bearing in
the last bore hole.
Hang 5 50 g weights (each approx. 2.5 N)
on the right side of the lever arm at the loca-
tion of force G.
Instead of force F deploy a dynamometer.
Bring the lever into a state of equillibrium
and then note down the force registered at
the dynamometer.
0
G
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F
F