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#16
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Re: Word problem
and yes, if you fire it backwards, it will be going 0mph relative to the ground, and just fall down... again, relative to the ground. It's aaalll about relativity. If you ignore air resistance,then firing the gun forwards would have the bullet ravel at 1400 mph before it smacked into the ground. But it'd only be going 1400mph relative to the ground again, from the train, either way you shoot it, it's going 700 mph.
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