Physics, 31.05.2020 00:00 icantspeakengles
In our usual coordinate system( +x to the right, +y up (away from the center of the Earth), +z out of the page toward you), what is the vector gravitational force on a 31 kg object sitting on the ground? (From the momentum principle you can conclude that a force of the same magnitude is exerted upward by the ground on the object if the momentum isn't changing. In Chapter 4 we'll see more about the origin of this force.)
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In our usual coordinate system( +x to the right, +y up (away from the center of the Earth), +z out o...
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