The robust friction apparatus can
be utilized in a simple experiment
to determine the
coefficient of static friction
for a variety of materials.

A test block, of known weight
and simple geometry, can be
placed on an incline plane
with a known angle to allow
the class to calculate
the coefficient of friction.


Demonstration of the fact
that friction is a
nonconservative force can
be done using the photogate-
timer.

The presenter can perform
experiments to show the energy
that is expended by friction.


The energy expended by friction
can be approximated by the
difference between potential
and kinetic energy.

The photogate-timer
provides the velocity
of sliding objects and gives
students the data needed for
the simple calculation.

Slip or tip conditions
should be able to be predicted,
and tested through simple
calculations using known angles
and the simple geometry.