
Conservation of Energy
Flashcard
•
Physics
•
9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the definition of gravitational potential energy?
Back
Gravitational potential energy is the energy an object possesses due to its position in a gravitational field, calculated as PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height above a reference point.
2.
FLASHCARD QUESTION
Front
How do you calculate gravitational potential energy?
Back
Gravitational potential energy (PE) is calculated using the formula: PE = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (approximately 10 m/s² on Earth), and h is the height in meters.
3.
FLASHCARD QUESTION
Front
What is the gravitational potential energy of a 50 kg dog at a height of 2 meters?
Back
PE = mgh = 50 kg * 10 m/s² * 2 m = 1000 J.
4.
FLASHCARD QUESTION
Front
If an object is dropped from a height, what happens to its gravitational potential energy?
Back
As the object falls, its gravitational potential energy decreases while its kinetic energy increases, conserving the total mechanical energy.
5.
FLASHCARD QUESTION
Front
What is the significance of the reference point in gravitational potential energy calculations?
Back
The reference point is the height from which potential energy is measured; it can affect the calculated value of gravitational potential energy.
6.
FLASHCARD QUESTION
Front
How does the height affect gravitational potential energy?
Back
Gravitational potential energy increases with height; doubling the height will double the potential energy, assuming mass and gravity remain constant.
7.
FLASHCARD QUESTION
Front
What is the gravitational potential energy of a 100 kg man on the second floor, 3.5 meters above the ground?
Back
PE = mgh = 100 kg * 10 m/s² * 3.5 m = 3500 J.
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