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Gravitational Potential Energy & Work Done + Calculation Example // HSC Physics
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This video in on the concept of gravitational potential energy and work done within a gravitational field. This video contains an explanation for why gravitational potential energy is negative.
⌚Timestamp
00:00 Why U = mgh is not used in space
02:42 New equation for gravitational potential energy
04:59 How potential energy varies with distance r
07:17 Work done in a gravitational field
09:31 Calculation example
📚Syllabus
• Derive quantitatively and apply the concepts of gravitational force and gravitational potential energy in radial gravitational fields to a variety of situations, including but not limited to:
– the concept of escape velocity 𝑣_esc=√(2𝐺𝑀/𝑟)
– total potential energy of a planet or satellite in its orbit U=−𝐺𝑀𝑚/𝑟
– total energy of a planet or satellite in its orbit U+K=−𝐺𝑀𝑚/2𝑟
– energy changes that occur when satellites move between orbits
– Kepler’s Laws of Planetary Motion
Why is gravitational potential energy negative? How to calculate gravitational potential energy? How to calculate work done using gravitational potential energy?
⌚Timestamp
00:00 Why U = mgh is not used in space
02:42 New equation for gravitational potential energy
04:59 How potential energy varies with distance r
07:17 Work done in a gravitational field
09:31 Calculation example
📚Syllabus
• Derive quantitatively and apply the concepts of gravitational force and gravitational potential energy in radial gravitational fields to a variety of situations, including but not limited to:
– the concept of escape velocity 𝑣_esc=√(2𝐺𝑀/𝑟)
– total potential energy of a planet or satellite in its orbit U=−𝐺𝑀𝑚/𝑟
– total energy of a planet or satellite in its orbit U+K=−𝐺𝑀𝑚/2𝑟
– energy changes that occur when satellites move between orbits
– Kepler’s Laws of Planetary Motion
Why is gravitational potential energy negative? How to calculate gravitational potential energy? How to calculate work done using gravitational potential energy?
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