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3 years ago

8

Why is the escape speed for a spacecraft independent of the spacecraft's mass?

1 answer:

scoray [572]3 years ago

7 0

In order to escape the gravitational pull of our planet, any object must have an escape velocity of 7 km/s or more, anything lower than that will be slowed down by the pull of gravity, and will eventually returned to the surface of our planet. It is independent of mass, any lighter or heavier object must attain the required escaped velocity to reach space.

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Answer:

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Explanation:

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$s=vt-\frac{1}{2}gt^2$

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Taking upward as positive direction, in this problem we have:

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Substituting these data, we can find v:

$v=\frac{s}{t}+\frac{1}{2}gt=-\frac{1.2}{1.3}+\frac{1}{2}(-9.8)(1.3)=-7.3 m/s$

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