Question

1. name two types of energy generated by friction and give an example of each.

Explanation:

When friction occurs, energy transformation takes place. Thermal energy is generated due to the rubbing of surfaces which causes molecules to vibrate more (increase in temperature). Mechanical energy (in the form of sound) is also produced as friction can cause vibrations in the medium (like air) which we perceive as sound.

Answer:

• Thermal energy: Rubbing hands together. The friction between the hands causes them to warm up as mechanical energy is converted into thermal energy.
• Mechanical energy (sound): Dragging a chair across a rough floor. The friction between the chair legs and the floor produces a squeaking sound (mechanical energy in the form of sound waves).