3B Scientific Friction Measuring Apparatus - Manual

3B SCIENTIFIC® PHYSICS
1
Friction Measuring Apparatus 1009942
Instruction sheet
07/12 DML/ALF
1 Friction surface
2 Clamp for dynamometer
3 Dynamometer
4 Stopper for the friction bod-
ies
5 Friction bodies
6 Additional weights
7 Sliders
8 Protractor
1. Description
The friction measuring apparatus is used to
measure static and rolling friction between dif-
ferent kinds of surfaces.
A friction track in the form of a mounted, rotating
U-shaped structure made of aluminium serves as
the basis for the experiments. Between the fric-
tion bodies and the friction plane, there is a long,
inlaid friction surface made of plastic, which can
be pulled at a uniform velocity. At the opposite
end, a dynamometer is horizontally clamped to
the friction track. The dynamometer shows the
frictional forces between the surfaces, resulting
from the movement of the sliding friction surface.
When the friction surface begins to move, the
body resting upon it experiences static friction
and is dragged along with the sliding surface. As
the sliding friction surface continues to be moved
at uniform velocity, the static friction changes to
sliding friction and the friction body remains at a
state of rest relative to the friction plane.
The friction bodies have surfaces of different
areas and degrees of roughness. This makes it
possible to investigate the influence the area of
contact and the nature of the surface has on the
frictional forces.
It is possible to vary the angle of the friction
track, thereby creating an incline to the horizon-
tal plane. In this way, the normal force with
which the friction body acts upon the particular
surface can be made to vary.
2. Scope of delivery
1 Friction plane
1 Friction body A
1 Friction body B
1 Friction body C
1 Sliding friction surface
1 Dynamometer
1 Stopper for the friction bodies
1 Sliders, rubber-coated
1 Sliders, Teflon-coated
1 Sliders, uncoated
3 Additional weights, 100 g