Instruction Sheet - 3B SCIENTIFIC PHYSICS U8405100 Bedienungsanleitung

3B SCIENTIFIC ® PHYSICS
Friction Measuring Apparatus U8405100

Instruction sheet

10/08 DML/ALF
1. Description
The friction measuring apparatus is used to meas-
ure static and rolling friction between different
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 friction
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 fric-
tion 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 slid-
ing friction surface continues to be moved at uni-
form 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 horizontal plane.
In this way, the normal force with which the fric-
tion 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
1
1 Friction surface
2 Clamp for dynamometer
3 Dynamometer
4 Stopper for the friction bodies
5 Friction bodies
6 Additional weights
7 Sliders
8 Protractor