5.2 Energy

Front

What is energy?

Back

Energy is the ability to do work or cause change. It exists in various forms, such as mechanical, thermal, electrical, and sound energy.

Front

What is mechanical energy?

Back

Mechanical energy is the sum of potential energy and kinetic energy in an object. It is the energy associated with the motion and position of an object.

Front

What is sound energy?

Back

Sound energy is a form of energy that is produced when an object vibrates, creating waves that travel through air, water, or solids.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter. It is the total kinetic energy of particles in an object.

Front

What is radiant energy?

Back

Radiant energy is the energy of electromagnetic waves, including light. It can travel through space and is responsible for the warmth of the sun.

Front

How is energy transformed when a violinist plays the violin?

Back

Mechanical energy is transformed into sound energy as the bow moves across the strings.

Front

What happens to electrical energy in a hairdryer?

Back

In a hairdryer, electrical energy is transformed into thermal energy to dry hair.

Front

What is an example of radiant energy?

Back

An example of radiant energy is sunlight, which provides light and warmth.

Front

What type of energy does a hand drill use?

Back

A hand drill uses mechanical energy to rotate the drill bit and make holes in materials.

Front

How does energy change forms in a light bulb?

Back

In a light bulb, electrical energy is transformed into radiant energy (light) and thermal energy (heat).