Chapter 7 Outline Potential Energy and Energy Conservation Gravitational potential energy Conservation of mechanical energy Elastic potential energy Springs.

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Presentation transcript:

Chapter 7 Outline Potential Energy and Energy Conservation Gravitational potential energy Conservation of mechanical energy Elastic potential energy Springs Conservative and non-conservative forces Conservation of energy Force and potential energy Energy diagrams

Potential Energy

Gravitational Potential Energy

Conservation of Mechanical Energy

Potential Energy Example

Elastic Potential Energy

Work Done by Other Forces

Potential Energy Example

Conservative vs. Non-conservative Forces

Properties of Conservative Forces The work done by any conservative force has these four properties. 1.Can be expressed as difference of potential energy. 2.Is reversible. 3.Is path-independent. 4.Closed loop work is zero.

Conservative or Non-conservative Example?

Law of Conservation of Energy

Force and Potential Energy (1D)

Force and Potential Energy (3D)

Energy Diagram We can glean a lot of information by looking at graph of the potential energy.

Energy Diagram Example

Chapter 7 Summary Potential Energy and Energy Conservation

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