Local Gravity: Explanation & Demo in New Video

In summary, local gravity is the gravitational force experienced at a specific location on Earth, which can vary due to factors such as altitude, latitude, and the density of the Earth's crust. It differs from the constant gravitational force on Earth, which is 9.8 meters per second squared. Variations in local gravity are caused by differences in the density and composition of the Earth's crust, and it is typically measured using a device called a gravimeter. Understanding local gravity is important for applications such as mineral exploration, mapping underground structures, predicting natural hazards, and calibrating instruments for space missions. It also helps in understanding the effects of gravity on objects and organisms on Earth.
  • #1
A.T.
Science Advisor
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Here is a new video, addressing a common question on this forum:

https://www.youtube.com/watch?v=jlTVIMOix3I

It's similar to that one, but has nice narration, and also shows an object thrown upward.
 
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  • #2
Thanks for sharing AT!
 

1. What is local gravity?

Local gravity refers to the gravitational force experienced at a specific location on Earth. It is affected by factors such as altitude, latitude, and the density of the Earth's crust.

2. How is local gravity different from the gravitational force on Earth?

While the gravitational force on Earth is constant at 9.8 meters per second squared, local gravity can vary depending on the location. This is because the Earth's surface is not perfectly smooth and its density is not uniform.

3. What causes variations in local gravity?

Variations in local gravity are caused by differences in the density and composition of the Earth's crust. For example, areas with dense rock formations will have a higher local gravity, while areas with less dense sedimentary rock will have a lower local gravity.

4. How is local gravity measured?

Local gravity is typically measured using a device called a gravimeter, which measures the acceleration due to gravity at a specific location. This data is then used to create a gravity map of the area.

5. Why is understanding local gravity important?

Understanding local gravity is important for a variety of reasons. It can help with mineral exploration, mapping underground structures, and predicting natural hazards such as landslides. It is also important for calibrating instruments used in space missions and understanding the effects of gravity on objects and organisms on Earth.

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