Physics Help Forum Special Relativity

 Special and General Relativity Special and General Relativity Physics Help Forum

 Nov 10th 2008, 02:43 AM #1 Junior Member   Join Date: Apr 2008 Posts: 5 Special Relativity 8. A meteorite is approaching Earth head on at speed 0.40 c: A missile is fired from earth toward the meteorite to destroy it before it hits the Earth. The missile travels at speed 0.20 c relative to the Earth. (a) How fast does an unfortunate astronaut stranded on the meteorite sees the missile approaching the meteorite? (b) If the missile is launched when the meteorite is 10^6 km from the Earth as measured by an observer on the Earth, how long does it take the missile to reach the meteorite as measured by an observer on Earth? (c) How long does it take for the missile to travel from the Earth to the meteorite as measured by a clock in the missile? (d) How long does it take for the missile to travel from the Earth to the meteorite as measured by the astronaut stranded on the meteorite? Sections (c) and (d), I'm quite confused with these 2 sections. Anybody care to explain to me what is going on here. Really confusing me!!! Last edited by ah-bee; Nov 10th 2008 at 02:59 AM.

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