what if a needle run at the Speed of light and hit the earth.
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The mass of our planet is an immense 5.9 x 10^24 kg. The needle is moving at the speed of light, or around 300,000,000 m/s. The Earth is moving at a much lower speed, 30,000 m/s. ... And such a wave of kinetic energy, combined with the impact of the collision, will probably destroy our planet and all life on it.
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