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11/14/2016 10:05:23 PM
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[quote]the idea of a spherical planet perpetually moving through space at 67,000mph without a force to keep it moving is, well, just plain absurd.[/quote] Objects don't need a constant force to move, they only need constant force to ACCELERATE (change speed). Moving requires an output of energy onto said object and it begins to move. The only reason objects stop moving on earth is because another object (air, floor, a wall etc, etc) apply force over time to stop the object from moving. This is why when you roll a ball it stops moving after a second or two. The earth and air are applying force to the object, therefore making it stop. Newton's third law: Every action has an equal and opposite REACTION. In Space there is no object to apply opposite force to the earth, therefore it keeps moving.
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  • [quote]Every action has an equal and opposite REACTION. In Space there is no object to apply opposite force to the earth, therefore it keeps moving.[/quote] So every action has an equal and opposite reaction (universal statement), except when it doesn't? Your second sentence above contradicts the first.

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  • Edited by Rick Sanchez: 11/15/2016 4:08:16 AM
    I stated the Earth needs no new force (currently) to keep moving. And it is still moving because nothing has enacted enough force to cause the earth to stop moving. Something has caused the earth to start moving through space, I don't know what it was but it was enough to make a planet with a mass of 5.972x10^24 kilograms to start moving. It was probably the forces created when the earth was forming. But he equal action was the earth moves, the opposite is the earth pushes back on the force causing it to move. The equal action now is the earth stays moving, the opposite would be the earth stops moving.

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