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Energy Transfer – Friction

Demonstrate frictional heating by measuring work done and increase in thermal energy.

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Work is performed by pulling on the yellow cord wrapped around the cylinder and lifting the mass. The percentage of work done converted to thermal energy is calculated. Using a Rotary Motion Sensor and a Force Sensor, a real-time graph of power versus time can be generated by PASCO Capstone or SPARKvue software. The area under this curve is the work performed.

A 10 kOhm thermistor is used to determine the temperature of the cylinder. A PASPORT Temperature Sensor can be used to graph the temperature real-time using PASCO Capstone or SPARKvue. Temperature may also be measured using an ohm meter and the conversion chart.

The cylinders are mounted with a plastic insulating bolt and are easily removable to determine their mass.