Learn on PengiAmplify Science (California) Grade 8Chapter 2: Investigating Potential Energy

Lesson 3: Energy Transfer

Key Idea.

Section 1

Work Transfers Energy

Key Idea

Applying force over a distance is defined as work.

When a person (or machine) pushes two repelling magnets closer together, they are performing work on the system.

Section 2

Relationship Between Work and Potential Energy (PE)

Key Idea

In a magnetic system, there is a direct, proportional relationship between the physical effort applied and the energy stored.

Input: The process begins with Work. This is the mechanical effort required to move a magnet against the direction it wants to go (e.g., forcing two repelling magnets closer together).

Lesson overview

Expand to review the lesson summary and core properties.

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Section 1

Work Transfers Energy

Key Idea

Applying force over a distance is defined as work.

When a person (or machine) pushes two repelling magnets closer together, they are performing work on the system.

Section 2

Relationship Between Work and Potential Energy (PE)

Key Idea

In a magnetic system, there is a direct, proportional relationship between the physical effort applied and the energy stored.

Input: The process begins with Work. This is the mechanical effort required to move a magnet against the direction it wants to go (e.g., forcing two repelling magnets closer together).