UNIVERSE
SATELLITESICY BODIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following is needed to calculate escape speed for a rocket from earth?
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mass of fuel used in the rocket
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mass of the rocket
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mass of Earth
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all of the above
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Explanation:
Detailed explanation-1: -The escape velocity vesc is expressed as vesc = Square root of√2GMr, where G is the gravitational constant, M is the mass of the attracting mass, and r is the distance from the centre of that mass.
Detailed explanation-2: -The escape speed of the earth at the surface is approximately 11.186 km/s. That means “an object should have a minimum of 11.186 km/s initial velocity to escape from earth’s gravity and fly to infinite space.”
Detailed explanation-3: -The equation for the escape velocity of a planet in our solar System is: v(e)= (2GM/R)^1/2. Your example would change the equation to: v(e)=(2G*4M/3R)^1/2 so when you cancel the threes you get v(e)=(2GM/R)^1/2 = 2V(e)
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