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If the Earth experiences a gravitational stretch of 0.3 meteres due to the moon doesn't that mean the radius of the earth is slightly increasing meaning that acceleration due to gravity has changed?
Wiki User
∙ 15y ago
Simply put, no. If something stretches, it keeps the same mass (which is what creates a gravitational pull). For example, take a rubber band and weight it. Stretch it out and weight it again. It still weighs the same amount. Now, if you're talking about the gravitational pull on Earth... .3 meters out of the diameter of the Earth is next to nothing, so it's almost literally impossible to tell that it even changes. Also as a side note, if a sphere stretches on an axis, its center of gravity stays in the same place. Well, the distance changes and the gravitational force gets smaller due to that. Also, weigh will be a bit less due to gravitational pull of Moon in the opposite direction. The effect is not big though.
Wiki User
∙ 15y ago
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What affects the earths gravitational pull?
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