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Plate tectonics. The earth's crust is broken up into a series of more-or-less rigid plates that slide around due to motion of material in the mantle below. Although the speeds of these plates vary somewhat, they are typically about 5 $\mathrm{cm} / \mathrm{yr.}$ . Assume that this rate remains constant over time. (a) If you and your neighbor live on opposite sides of a plate boundary at which one plate is moving northward at 5.0 $\mathrm{cm} / \mathrm{yr}$ with respect to the other plate, how far apart do your houses move in a century? (b) Los Angeles is presently 550 $\mathrm{km}$ south of San Francisco, but is on a plate moving northward relative to San Francisco. If the 5.0 $\mathrm{cm} / \mathrm{yr}$ velocity continues, how many years will it take before Los Angeles has moved up to San Francisco?
a) 5 $\mathrm{m}$b) $11 \times 10^{6}$ yrs
Physics 101 Mechanics
Chapter 2
Motion along a Straight Line
Physics Basics
Motion Along a Straight Line
Motion in 2d or 3d
Newton's Laws of Motion
Simon Fraser University
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University of Sheffield
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stop it. We know that one century in stick weirdo 100 years on DH one kilometer is house and moved up, which is then equal to 10 to the five centimetre. Since one leader, this 100 centimeter. Not for a party. You know, the distance is sick, went, Oh, velocity times. Stein. And then there is no acceleration. So this is equal five centimetres a year. Times the number off my ears in one century. What isthe 100? Yeah, yeah, for the distances. I kind of sending me there. Five in runs and Judy now dying and sick. Waldo. Distance over velocity. As you can see from this, a question on foot a distance away. 5 50 times. 10 to the five cm. We have time. So we divide the velocity. And this is a quite a 1.1 line straight into the fire. Seven years.
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