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6 Oct 2020
In Robert Heinlein's The Moon Is a Harsh Mistress, the colonial inhabitants of the Moon threaten to launch rocks down onto Earth if they are not given independence (or at least representation). Assuming a gun could launch a rock of mass in at twice the lunar escape speed, calculate the speed of the rock as it enters Earth's atmosphere.
In Robert Heinlein's The Moon Is a Harsh Mistress, the colonial inhabitants of the Moon threaten to launch rocks down onto Earth if they are not given independence (or at least representation). Assuming a gun could launch a rock of mass in at twice the lunar escape speed, calculate the speed of the rock as it enters Earth's atmosphere.
Zubair AslamLv8
7 Jan 2021
