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The blocks
are rectangular steel prisms, and initial measurements of the angle at
which slip just occurs should be made with a large area face in contact with
the inclined unlubricated plane. Repeat the measurement several times to determine
the uncertainty in the measured value of slip angle. Explore the dependence
of the angle at which slip just occurs on the orientation of the block
with the same surface in contact with the plane.
One surface of a block
has a rough finish and another has a smooth ground finish. Determine the effect
of the surface finish on your data (both the initial angle for slip and
the spread in this value). Some weights are provided to increase the force
between the block and the plane. Determine the effect of increasing the weight
of the slipping system on the angle at which slipping occurs. Make several
measurements under the same conditions to determine their repeatability. |
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