{"id":287,"date":"2026-06-21T02:02:36","date_gmt":"2026-06-21T02:02:36","guid":{"rendered":"https:\/\/physicsfundamentalsinfo.com\/blog\/?p=287"},"modified":"2026-06-21T02:02:37","modified_gmt":"2026-06-21T02:02:37","slug":"potential-energy","status":"publish","type":"post","link":"https:\/\/physicsfundamentalsinfo.com\/blog\/mechanics\/potential-energy\/","title":{"rendered":"Potential Energy: Definition, Types & Formula"},"content":{"rendered":"\n
Definition<\/div>

\nPotential energy is the energy stored in an object because of its position, shape, or configuration, ready to be released as motion or another form of energy. For an object of mass m at height h, gravitational potential energy equals mgh, where g is the gravitational field strength. Its SI unit is the joule (J).\n<\/p><\/div>\n\n

Lift a book over your head and hold it perfectly still. Nothing is moving, no engine is running \u2014 yet something has changed. You have loaded that book with energy, and the floor will find out the instant you let go.<\/p>\n\n

That waiting, stored energy is potential energy. It hides in a drawn bow, in water trapped behind a dam, in the food on your plate, even in the charge sitting on your phone battery. None of it does anything visible \u2014 until it is released.<\/p>\n\n

What Is Potential Energy?<\/h2>\n\n

Potential energy is the energy an object stores because of where<\/em> it is or how<\/em> it is arranged, rather than because it is moving. Stretch a spring, raise a mass, push two magnets together: each time you do work, and that work is banked as energy the system can pay back later.<\/p>\n\n

It is one of the two great families of mechanical energy \u2014 the other being kinetic energy<\/a>, the energy of motion. For the wider map of how all the forms fit together, see our guide to energy in physics<\/a>.<\/p>\n\n

The word potential<\/em> is the clue. The energy is latent, not active. A boulder resting on a clifftop isn’t doing a thing \u2014 but it holds the potential<\/em> to do a great deal the moment it tips over the edge.<\/p>\n\n\n \n <\/path><\/marker>\n <\/path><\/marker>\n <\/defs>\n <\/rect>\n <\/rect>\n <\/line>\n Reference level (h = 0)<\/text>\n PE = mgh<\/tspan><\/text>\n energy stored by position<\/text>\n <\/line>\n h<\/text>\n height<\/text>\n <\/circle>\n mass m<\/text>\n <\/line>\n g<\/text>\n 9.81 m\/s\u00b2<\/text>\n <\/circle>\n<\/svg>\n

Gravitational potential energy depends on mass, gravity, and height above a chosen reference level.<\/p>\n\n

The Potential Energy Formula<\/h2>\n\n

There isn’t one single formula for potential energy, because energy can be stored in different ways. But three formulas cover almost everything you will meet, and the first is the one most people mean by “the PE formula”.<\/p>\n\n

Gravitational potential energy: PE = mgh<\/h3>\n\n

Near the Earth’s surface, the gravitational potential energy of a raised object is the product of just three quantities:<\/p>\n\n

PE = m \u00d7 g \u00d7 h<\/div>\n\n

Each symbol, with its SI unit:<\/p>\n\n