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Physics162 views·Updated 3 Sept 2026·1 pageUnderstanding Gravitational Potential Energy in Objects
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Gravitational Potential Energy - How Height Creates Stored Energy
Think about holding a football above your head versus holding it at waist height - the higher position stores more energy that could be released if you drop it. When you lift an object in a gravitational field, you're doing work against gravity, which transfers energy into the object's gravitational potential energy store.
The brilliant thing about this stored energy is that it's completely predictable. Three factors determine how much energy gets stored: the object's mass (heavier objects store more energy), the height you lift it to (higher means more energy), and the gravitational field strength (which is about 9.8 N/kg on Earth).
You can calculate exactly how much energy is stored using the equation Ep = mgh. Here, Ep represents the gravitational potential energy in joules, m is mass in kilograms, g is gravitational field strength in N/kg, and h is height in metres.
Quick Check: A 2kg textbook lifted 1.5m high stores about 29.4J of energy - enough to power a small LED bulb for several seconds!
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Physics162 views·Updated 3 Sept 2026·1 pageUnderstanding Gravitational Potential Energy in Objects
Ever wondered why you feel tired after carrying your bag up several flights of stairs? You're actually doing work against gravity and storing energy in your bag! This energy is called gravitational potential energy, and it's everywhere around us.
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Gravitational Potential Energy - How Height Creates Stored Energy
Think about holding a football above your head versus holding it at waist height - the higher position stores more energy that could be released if you drop it. When you lift an object in a gravitational field, you're doing work against gravity, which transfers energy into the object's gravitational potential energy store.
The brilliant thing about this stored energy is that it's completely predictable. Three factors determine how much energy gets stored: the object's mass (heavier objects store more energy), the height you lift it to (higher means more energy), and the gravitational field strength (which is about 9.8 N/kg on Earth).
You can calculate exactly how much energy is stored using the equation Ep = mgh. Here, Ep represents the gravitational potential energy in joules, m is mass in kilograms, g is gravitational field strength in N/kg, and h is height in metres.
Quick Check: A 2kg textbook lifted 1.5m high stores about 29.4J of energy - enough to power a small LED bulb for several seconds!
We thought you’d never ask...
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
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Explore key concepts in Forces and Motion, including Hooke's Law, velocity, acceleration, and the principles of moments. This summary covers essential topics such as the relationship between force and extension, terminal velocity, and the impact of safety devices in physics. Ideal for AQA Physics Unit 5 revision.
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Explore essential GCSE Physics practicals for AQA, covering key concepts such as Hooke's Law, wave properties, thermal insulation, and electrical circuits. This comprehensive guide includes step-by-step procedures, variables, and safety considerations for each experiment, ensuring a thorough understanding of practical applications in physics.
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Concise notes for Edexcel Physics Paper 2 (combined & triple science)
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9SociologySociology of Families: Comprehensive Revision
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Students love us — and so will you.
4.6/5App Store
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This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha KlichAndroid user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
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