Introduction to Gravitational Potential Energy with Zero Line Examples

The video tutorial explains gravitational potential energy, represented by PE or U with a subscript g. It covers the formula mgh, where m is mass, g is gravity, and h is height. The concept of the horizontal zero line is crucial for determining potential energy, which can be positive, negative, or zero based on the object's position relative to this line. The tutorial emphasizes the importance of setting the horizontal zero line and concludes with a discussion on units of measurement, highlighting that gravitational potential energy is measured in joules.

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