Calculate the escape velocity for a rocket fired from the earth's surface at a point...

WAEC 1989

Calculate the escape velocity for a rocket fired from the earth's surface at a point where the acceleration due to gravity is 10ms^-2 and the radius of the earth is 6 x 10⁶m.

A. 7.8 x 10⁶ms^-12
B. 1.1 x 10⁴ms^-1
C. 3.5 x 10⁷ms^-1
D. 6.0 x 10⁷ ms^-1
E. 1.2 x 10⁸ms^2-1

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Correct Answer: Option B

Explanation

Hint: V = √2gr = √(2x10x6x10⁶) + 1.1 x 10⁴ms^-1

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Calculate the escape velocity for a rocket fired from the earth's surface at a point...

Correct Answer: Option B

Explanation

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