![]() ![]() (Radians are a unit of measurement to use with rotations, instead of degrees.) It’s a measure of rotational speed instead of what we normally think of as velocity-movement in a straight line. Since the Earth rotates about once a day ( there's a difference between sidereal and synodic rotations), it has an angular velocity of 7.29 x 10 -5 radians per second.Īngular velocity is different than linear velocity. (Remember, you need to move really fast to get into orbit.) If you were standing on the top of a 400-kilometer tower with the base somewhere on the Earth's equator, you would indeed be moving, because the planet is rotating-this is just like the motion of a person on the outside of a spinning merry-go-round. Also, it would require massive amounts of material.īut that's not the biggest problem-there's still the issue with speed. First, you couldn't easily build a structure like this out of steel the weight would likely compress and collapse the lower parts of the tower. ![]()
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