- #1

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However, isn't the displacement zero? And velocity = displacement/time?

so is this a textbook typo, or is there another point I'm missing? xD

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- #1

- 15

- 0

However, isn't the displacement zero? And velocity = displacement/time?

so is this a textbook typo, or is there another point I'm missing? xD

- #2

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displacement is a vector quantity so it is linear, the displacement would be the whole circumference of the earth, as it is a vector quantity ;)

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- #3

jtbell

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The

- #4

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No, displacement is a vector quantity.

Distance is scalar

Distance is scalar

- #5

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velocity = displacement/time

is a vectpr equation, describing the AVERAGE velocity.

If you travel around the world, starting and ending at the same location, at a constant speed, your average velocity is zero because during half the travel, the direction of your velocity vector is one way. During the other half of the travel, it's direction is the opposite way.

Since you are moving at constant speed, the AVERAGE speed, defined as

speed = distance/time (which is also the only speed you travel at) will be

2*pi*r/t

- #6

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Eg, if we travel halfway across the globe, would our displacement be the diameter of the Earth or will it be equal to [itex]\Pi[/itex]r ?

- #7

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I would say the diameter would be the displacement in this case.By the way, do we consider a geodesic or straight line displacement (which actually is the shortest distance between these two points!) in this case, for the displacement vector?

Eg, if we travel halfway across the globe, would our displacement be the diameter of the Earth or will it be equal to Πr ?

- #8

jtbell

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Distance is the length along the path traveled (πr in this case).

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