Page 62 - Science Course 2 (Book 2)
P. 62
Mo9-L3a: What are Kinetic and Potential Energy?
Kinetic and Potential Energies Combined Key Concept
Objects such as wind turbine blades and particles, What are Kinetic and Potential Energy?
such as molecules, ions, atoms, and electrons, often
have kinetic and potential energies. How are kinetic and potential energy different?
The sum of potential energy and kinetic energy in a
system of objects is mechanical energy.
As a coaster car loses height, It gains speed; PE is SUMMARY
transformed into KE.
What are Kinetic and Potential Energy?
As a coaster car gains height it loses speed; KE is There are different forms of energy, including
transformed into PE. solar energy.
The sum of the KE and PE is a constant. Wind turbines have different kinds of energy
including kinetic, mechanical, potential, and
thermal.
Mechanical energy is the energy an object has
because of a combination of the following:
• the movement of its parts (kinetic energy)
• the position of its parts (potential energy)
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