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Using
the same block and plane, place one of the small area surfaces in contact with
the plane and
repeat the measurement of the slip angle. These surfaces
also offer different surface roughness. Do
these alter the outcome of your
measurements?
Gently tap the plane to induce small amplitude vibrations.
What effect does this have on the angle at which slip starts to occur? Why?
Do the induced vibratons alter the spread in the measured angle for slip?
Use
another glass plane and explore the effect of lubrication between
the block and the plane on the slip angle and its spread. One experimental system
is provided for this measurement and to prevent contamination of the clean
systems, only this should be used for the lubrication studies. Blocks should
not be transferred to this experiment from the dry systems. Does inducing
vibrations in the plane alter the angle at which initial slip occurs and the
spread in the value of this angle? |
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