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Anonymouse · 29-03-2023, 22:15

It's not the size that matters as much as the velocity of impact. KE = 1/2 mass times the square of the velocity. Any rock hitting us is bad news.

(Incidentally, that's why, in some areas, the speed limit was lowered from 40mph to 30. Reason: square 30, you get 900...but square 40 and you get 1600, i.e. nearly double the kinetic energy. This is why impacts at 30 are so much more survivable...and why motorways are so dangerous if things go wrong.)

We definitely need Spaceguard to spot these wayward rocks sooner. Come back, Clarke, all is forgiven.

29-03-2023, 22:15	#15
Anonymouse RIP Tigger - 12 years?! Join Date: Jul 2005 Location: Bolton Age: 59 Services: EE Superfast Broadband Posts: 1,566	Re: Asteroid passing close to the Earth It's not the size that matters as much as the velocity of impact. KE = 1/2 mass times the square of the velocity. Any rock hitting us is bad news. (Incidentally, that's why, in some areas, the speed limit was lowered from 40mph to 30. Reason: square 30, you get 900...but square 40 and you get 1600, i.e. nearly double the kinetic energy. This is why impacts at 30 are so much more survivable...and why motorways are so dangerous if things go wrong.) We definitely need Spaceguard to spot these wayward rocks sooner. Come back, Clarke, all is forgiven. __________________ "People tend to confuse the words 'new' and 'improved'." - Agent Phil Coulson, S.H.I.E.L.D. WINDOWS 11, ANYONE?!