Calculate the escape velocity of a satellite launched from the earth's surface if the radius...

Physics

JAMB 2014

Calculate the escape velocity of a satellite launched from the earth's surface if the radius of the earth is 6.4x10⁶m

A. 25.3kms^-1
B. 4.2kms^-1
C. 4.0kms^-1
D. 11.3kms^-1

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Correct Answer: Option D

Explanation

V_escape = \(\sqrt{2gR}\)
V_escape = \(\sqrt{2\times10\times6.4\times10^6}\)
V_escape = \(\sqrt{128000000}\)
V_escape = 11313.7085mS^-1
V_escape = 11.313kmS^-1

There is an explanation video available below.

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Calculate the escape velocity of a satellite launched from the earth's surface if the radius...

Correct Answer: Option D

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