SATHEE: Gravitation Question 155

Gravitation Question 155

Question: The least velocity required to throw a body away from the surface of a planet so that it may not return is (radius of the planet is $[6.4 \times 10^{6} m,,, g = 9.8, m / s e c^{2})]$ [AMU (Engg.) 1999]

Options:

A) $[9.8 \times 10^{- 3} m / s e c]$

B) $[12.8 \times 10^{3} m / s e c]$

C) $[9.8 \times 10^{3} m / s e c]$

D) $[11.2 \times 10^{3} m / s e c]$

Show Answer

Answer:

Correct Answer: D

Solution:

Escape velocity from surface of earth

$[v_{e} = \sqrt{2 g R}]$ = $[\sqrt{2 \times 9.8 \times 6.4 \times 10^{6}} = 11.2 \times 10^{3} m / s]$

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Gravitation Question 155

Question: The least velocity required to throw a body away from the surface of a planet so that it may not return is (radius of the planet is [6.4×106m,,,g=9.8,m/sec2)] [AMU (Engg.) 1999]

Options:

Answer:

Solution:

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Question: The least velocity required to throw a body away from the surface of a planet so that it may not return is (radius of the planet is $[6.4 \times 10^{6} m,,, g = 9.8, m / s e c^{2})]$ [AMU (Engg.) 1999]