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What is the terminal velocity of mass falling toward earth? 
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#1
Dec1308, 11:50 AM

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Assume no atmosphere; no friction; no extraneous factors.
What is the terminal velocity of a mass that falls from the edge of earth's gravity well to earth's surface? Thank you in advance for your answer. Peace rwj 


#2
Dec1308, 12:03 PM

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PF Gold
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#3
Dec1308, 12:11 PM

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PF Gold
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As modelled by classical Newtonian mechanics, the "edge" where there is zero influence from Earth's gravity must be placed infinitely far away from the Earth. If we imagine a a particle starting at rest at infinity, and then is solely influenced by earth's gravity, then it will hit Earth with the velocity known as "escape velocity". Perhaps you might call this a "terminal velocity", but that would be an abuse of terms, as Hootenanny has told you already. 


#4
Dec1308, 12:49 PM

P: 16

What is the terminal velocity of mass falling toward earth?
I commend you on your insight. I will predict that a freefalling mass will reach maximum velocity of 40,200 km/h as it hits the surface of the earth. Thanks rwj 


#5
Dec1308, 12:53 PM

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#6
Dec1308, 01:05 PM

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Peace rwj 


#7
Dec1308, 01:17 PM

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You are indeed correct, the escape velocity from earth is indeed approximately 40 000 km/h. Apologies for the mixup! 


#8
Dec1308, 01:20 PM

P: 143




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