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by freanne on October 13th, 2009

freanne

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Discuss the statement "If a projectile is fired at more than 18,000 mi/h horizontally, it wont come down.

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  • by maisteri on October 13th, 2009

    maisteri

    The projectile starts orbiting Earth. It falls towards Earth, but misses it because of the tangential velocity (18000mph), and keeps "falling" indefinitely. Or if expressed the other way, the projectile is trying to fly in a straight line, but Earth's gravity curves the path.

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If a projectile is fired at more than 18 000 mi h horizontally it wont come down
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