The comet which is violent and large scale, causing sudden and violent upheaval is known as "Cataclysmic Comet"
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Allowing for a platform in which the box holds potential energy
Yes, think about the difference of swinging a bat and not hitting a ball. It's fairly easy right? Now, when you hit a ball with the bat, you will feel the bat sting your hands. That's the force the ball is exerting on the bat!
3780 km.
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