Calculating gravitational potential energy | Modeling energy | High school physics | Khan Academy

TL;DR

Learn about gravitational potential energy and how it is calculated using mass, height, and the gravitational field constant.

Transcript

• [Instructor] In previous videos, we have introduced the idea of energy as the capacity to do work and we have talked about multiple types of energies. We've talked about kinetic energy, energy due to motion. We've talked about potential energy, which is energy by virtue of position. And when we're talking about potential energy, we're talking abo... Read More

Key Insights

• 💆 Gravitational potential energy depends on an object's mass, height, and the gravitational field constant.
• ☺️ The formula for gravitational potential energy is mass x gravitational field constant x height.
• 💦 Gravitational potential energy has the same units as work, which is joules.
• 🧘 Gravitational potential energy is a type of potential energy that is specific to an object's position in a gravitational field.
• ✋ The higher an object is positioned in a gravitational field, the more gravitational potential energy it possesses.
• 💁 Gravitational potential energy can be converted into other forms of energy, such as kinetic energy.
• 💆 Gravitational potential energy can be calculated as long as the values of mass, height, and gravitational field constant are known.

Questions & Answers

Q: What is gravitational potential energy?

Gravitational potential energy is a type of potential energy that refers to the energy an object possesses due to its position in a gravitational field.

Q: How is gravitational potential energy calculated?

Gravitational potential energy is calculated by multiplying an object's mass by the gravitational field constant (g) and the object's height.

Q: What are the units for gravitational potential energy?

The units for gravitational potential energy are joules, which is also the unit for work.

Q: How does gravitational potential energy relate to work?

Gravitational potential energy is the amount of work required to move an object from one position to another in a gravitational field.

Summary & Key Takeaways

• Gravitational potential energy is a type of potential energy that is dependent on an object's position in a gravitational field.

• The formula to calculate gravitational potential energy is mass multiplied by the gravitational field constant (g) multiplied by height.

• The units for gravitational potential energy are joules, which is also the unit for work.