it is actually 16 times as strong exactly, and it can actually be done mentally
the first E is .002888(20)^4
the second E is .002888(40)^2
this answer differs from the first one by 2^4 which is 16
You could of course on your calculator perform each of the calculations, then divide one by the other.
Guess what, you will get 16
so a speed of 40 knots has 16 times as much energy as a speed of 20 knots.
why did you multiply the second E to the 2nd power and the first E to the 4th power?
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