A) How much work is done by the Moon\'s gravitational field as a 900 kg meteor c

Question

A) How much work is done by the Moon's gravitational field as a 900 kg meteor comes in from outer space and impacts on the Moon's surface?
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How much work is done by the Moon's gravitational field as a 900 kg meteor comes in from outer space and impacts on the Moon's surface? A space probe is fired as a projectile from the Earth's surface with an initial speed of 1.66 times 104 m/s. What will its speed be when it is very far from the Earth? Ignore atmospheric friction and the rotation of the Earth.

Explanation / Answer

W = -delta U

-(-GMm/R - 0)

= 6.67*10^-11*7.36*10^22*900/1.74*10^6

= 2.54*10^9 J

b) Kf + Uf = Ki + Ui

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