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Questions and Answers
What is the formula for calculating Gravitational Potential Energy (GPE)?
What is the formula for calculating Gravitational Potential Energy (GPE)?
- GPE = mass x height
- GPE = gravitational field strength x height
- GPE = mass x gravitational field strength x height (correct)
- GPE = mass + height
Gravitational Potential Energy decreases as an object is lifted upwards.
Gravitational Potential Energy decreases as an object is lifted upwards.
False (B)
What does the variable 'g' represent in the GPE formula?
What does the variable 'g' represent in the GPE formula?
Gravitational field strength
When an object is lowered down, its GPE __________.
When an object is lowered down, its GPE __________.
What factors affect the amount of GPE an object has?
What factors affect the amount of GPE an object has?
Match the terms with their definitions:
Match the terms with their definitions:
Calculate the GPE of an object with a mass of 10kg lifted to a height of 20m on Earth (g = 9.81 N/kg). Provide units.
Calculate the GPE of an object with a mass of 10kg lifted to a height of 20m on Earth (g = 9.81 N/kg). Provide units.
Earth's gravitational field strength is approximately 9.81 N/kg.
Earth's gravitational field strength is approximately 9.81 N/kg.
The gravitational potential energy increases as the object is lifted due to an increase in its __________.
The gravitational potential energy increases as the object is lifted due to an increase in its __________.
What is the formula for gravitational potential energy (GPE)?
What is the formula for gravitational potential energy (GPE)?
An object gains gravitational potential energy when it falls.
An object gains gravitational potential energy when it falls.
Calculate the GPE for an object with a mass of 300 kg raised by 5 m.
Calculate the GPE for an object with a mass of 300 kg raised by 5 m.
When a ball falls from a tree, its gravitational potential energy _________.
When a ball falls from a tree, its gravitational potential energy _________.
What happens to the gravitational potential energy of a car on a level road?
What happens to the gravitational potential energy of a car on a level road?
The gravitational field strength on Earth is approximately 9.8 N/kg.
The gravitational field strength on Earth is approximately 9.8 N/kg.
If an astronaut jumps 0.5m on the moon, explain why the GPE gained is less than if he jumped the same distance on Earth.
If an astronaut jumps 0.5m on the moon, explain why the GPE gained is less than if he jumped the same distance on Earth.
Match the following gravitational potential energy scenarios with their outcomes:
Match the following gravitational potential energy scenarios with their outcomes:
Flashcards
Gravitational Potential Energy (GPE)
Gravitational Potential Energy (GPE)
Energy stored in an object due to its position in a gravitational field. It increases as an object is lifted higher and decreases as it is lowered.
Gravitational Field Strength (g)
Gravitational Field Strength (g)
The force of attraction between any two objects with mass. On Earth, it's approximately 9.81 N/kg.
Work Done
Work Done
The amount of energy transferred when an object is moved a certain distance against a force.
GPE Equation
GPE Equation
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Joule (J)
Joule (J)
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Kinetic Energy
Kinetic Energy
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Elastic Potential Energy
Elastic Potential Energy
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Energy Transfer
Energy Transfer
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What is the equation for Gravitational Potential Energy (GPE)?
What is the equation for Gravitational Potential Energy (GPE)?
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What happens to the GPE of a ball when it falls from a tree?
What happens to the GPE of a ball when it falls from a tree?
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What happens to the GPE of a car travelling on a level road?
What happens to the GPE of a car travelling on a level road?
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What happens to the GPE of a child on a swing as they move from one extreme to the other?
What happens to the GPE of a child on a swing as they move from one extreme to the other?
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Why does an astronaut gain less GPE jumping on the moon compared to Earth?
Why does an astronaut gain less GPE jumping on the moon compared to Earth?
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What is the GPE of an object with a mass of 300kg raised 5m?
What is the GPE of an object with a mass of 300kg raised 5m?
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Study Notes
Gravitational Potential Energy
- Gravitational potential energy (GPE) is energy stored in an object due to its position in a gravitational field.
- When an object is lifted, its GPE increases. When an object is lowered, its GPE decreases.
Calculating GPE
- GPE is calculated using the formula: GPE = m × g × h
- GPE = gravitational potential energy (measured in Joules)
- m = mass (measured in kilograms)
- g = gravitational field strength (measured in N/kg)
- h = height (measured in meters)
- Earth's gravitational field strength is approximately 9.81 N/kg.
Understanding 'g'
- 'g' represents the strength of Earth's gravity. It measures how much force one mass exerts on another.
- The value of 'g' is provided in calculations.
Calculation Steps
- Step 1: Write down the relevant formula (GPE = m × g × h).
- Step 2: Identify all known values (mass, gravitational field strength, height) with units.
- Step 3: Substitute the known values into the formula.
- Step 4: Perform the calculation to solve for GPE.
- Step 5: State the answer with the correct units (Joules).
Example Calculations
- Example calculations are provided, with detailed steps, in the provided documents. Specifically, example calculation with mass 10kg lifted 20 meters on Earth.
- Another example demonstrates calculation of height when given the GPE.
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