dylankc asked in Science & MathematicsPhysics · 7 months ago

# Velocity around the earth?

If I traveled around the earth and ended up in exactly the same place, is my velocity 0 regardless of speed? Since the displacement would be 0 metres

Relevance
• 7 months ago

We have to be careful with terminology. We can say:

"The *average* velocity *relative to the earth* is zero."

Total displacement = 0 because start and end points are the same. And displacement = average velocity x time. So it's self-consistent.

• goring
Lv 6
7 months ago

if you sit on a spot on the earth spin of 24 hours later you are still in the same spot on the earth

Your velocity relative to the center of mass of the Galaxy would be approx 300 kilometers per seconds.

• 7 months ago

No, Velocity is speed and direction. It is a vector. Even though you ended up at the same location you still have speed and direction. ie Still going clockwise around the earth, as viewed from Atlanta, Ga., at 300 Mi/h.

• Anonymous
7 months ago

If you went AROUND the Earth, your displacement would NOT be zero. It would be the distance that you travelled. Now how much time did it take? Zero time?

Velocity is simply DISTANCE per TIME.

• Steve4Physics
Lv 7
7 months agoReport

Displacement has magnitude equals to the distance between the start point (A) and the end point (B) no matter what route you take from A to B.

So if you go in a complete loop (any shape) and end up where you started from, the displacement is zero - even though the distance travelled is not zero.

• 7 months ago

Yes, your average velocity is zero.

V = (change of position)/(change of time)

• 7 months ago

Well, yes. Once you stop your velocity is 0.