Ever wondered why you feel tired after carrying your bag... Show more
Physics155 views·Updated May 21, 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 .
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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Physics155 views·Updated May 21, 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 .
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...
What is the Knowunity AI companion?
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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Stefan SiOS user
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Samantha KlichAndroid user
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