Relevant Resource questions :

Concepts demonstrated :

• Conversion of work to heat
• transformation of energy

Equipment needed :

• Electric drill
• wood
• thermometer
• CCD camera
• clamp (optional).

• Drill a hole in the wood, often stopping the drilling to measure the temperature (T) with a thermometer.

Physics involved :

Conversion of work to heat. How to use the Demonstration :

• Drill the wood (having clamped dowel or holding it by hand) and show the increase in temperature caused by the drilling friction.

• Ice skating (friction between the skate and the ice surface).

Other Comments :