1. What is Energy?

2. What is Energy?
Energy is the ability of an object to produce a change in itself or the world around it.
Whenever work is done, energy is transformed or is transferred from one system to another.

3. Energy Transformations

4. Gravitational Potential Energy
Potential energy (PE) is sometimes called energy of position because it results from the relative positions of objects in a system.
𝑷𝑬=𝒎𝒈𝒉

5. Kinetic Energy
The energy resulting from the motion of an object is called kinetic energy.
𝑲𝑬= 𝟏 𝟐 𝒎 𝒗 𝟐

6. Types of Energy

7. 𝒎𝒆𝒄𝒉𝒂𝒏𝒊𝒄𝒂𝒍 𝒆𝒏𝒆𝒓𝒈𝒚=𝑲𝑬+𝑷𝑬
Other Forms of Energy
The sum of the kinetic and potential energy in a system is called mechanical energy.
𝒎𝒆𝒄𝒉𝒂𝒏𝒊𝒄𝒂𝒍 𝒆𝒏𝒆𝒓𝒈𝒚=𝑲𝑬+𝑷𝑬
Energy that lies at the level of the atom is sometimes called non-mechanical energy.

8. Other Forms of Energy
Plants use photosynthesis to turn the energy of sunlight into chemical energy.
The sun’s energy comes from nuclear fusion.

9. Other Forms of Energy
Energy can be stored in electrical fields, which have electrical potential energy.

10. Other Forms of Energy
Light energy travels from the sun to the Earth across empty space in the form of electromagnetic waves.
Electromagnetic waves are made up of electric and magnetic waves.