Objective: Verifying the First Law of Thermodynamics
The experiment is to investigate the increase of internal energy of an aluminium body caused by friction.
The increase can be observed by measuring the increase in the temperature of the body, which
is proportional to the work done, as the body undergoes no change in the state of aggregation and no
chemical reaction occurs. To eliminate the effect of heat exchange between the aluminium body and
the environment as far as possible, begin the series of measurements slightly below room temperature
and end the series at a temperature slightly above room temperature. The difference below and above
room temperature prior to starting the measurements and at the point of concluding them should
approximately be the same.