Quote:
Originally Posted by crwilli
I thought mass approaches infinity at the speed of light? E=MC2?
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In classic physics, the mass of the needle would mean very little, even if it was moving at 300,000,000 m/s
The mass of a needle is around 1 gram, or around 0.001 kg.
The mass of our planet is 5.9 x 10^24 kg.
Conservation of momentum: the two bodies with such a mass difference would be insignificant. The Earth would neither budge nor even blink.
Quantum physics, watch out!
"Momentum" of the needle would be infinity at the speed of light. Bad news for Earth. Game over!
Good thing objects with mass can not travel at the speed of light... As far as we know!!!
