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Well, if he doesn't slow down, then he'll hit the Earth at 86,000 mph. So, $$KE = \frac {mv^2}{2}$$ $$KE = \frac {158.3 kg\times (38445 m/s)^2}{2}$$ $$KE = 1.17\times 10^{11} N$$ I have no idea how to calculate the size of the carter it creates.


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If you consider it hopeless to memorize physical constants, it will probably help to find combinations of these constant that relate to the human scale. For instance: The gravitational constant $G$ might be difficult to memorize. This holds for both the units as well as the value. However, multiply this constant by the density of water, take the square ...



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