What is Gravitational Potential Energy?

Gravitational potential energy (GPE) is the energy an object possesses because of its position in a gravitational field. The higher an object is elevated, the greater its gravitational potential energy.

How is it calculated?

The gravitational potential energy (PE) of an object near the surface of the Earth is given by:

PE = m × g × h

Where:

• PE is the potential energy in joules (J)
• m is the mass of the object in kilograms (kg)
• g is the acceleration due to gravity (9.8 m/s² on Earth)
• h is the height of the object above a reference point in meters (m)

Real-world Applications

• Hydropower: Water stored in dams has gravitational potential energy that is converted to electricity.
• Roller Coasters: Cars gain potential energy as they're lifted to the top of the first hill.
• Pendulums: The bob has maximum potential energy at its highest points.
• Construction: Materials lifted to higher floors have increased potential energy.
• Sports: In pole vaulting, athletes convert kinetic energy to potential energy to clear the bar.