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For an object of mass the energy required to escape the Earth's gravitational field is GMm / r, a function of the object's mass (where r is the radius of the Earth, G is the gravitational constant, and M is the mass of the Earth, M =5.9736Ã10 24 kg).or a mass equal to a Saturn V rocket, the escape velocity relative to the launch pad is 253.5 am/s (8 nanometers per year) faster than the escape velocity relative to the mutual center of mass.
A rocket must reach escape velocity to leave Earth's orbit and escape velocity is greater than orbital velocity. What are the three main types of rockets that power modern spacecraft? What happens to the first stage of a multistage rocket? What happens to the second stage when the first stage uses up its fuel? what is the main advantage of a multistage rocket