Run Fastest to Weigh Most at Equator!

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In summary, to weigh as much as possible on the equator, one would need to run in the direction that reduces the effect of the Earth's non-spherical shape, which causes a decrease in apparent gravitational force. This can be achieved by running at a high speed in a westward direction.
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Johny158
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Homework Statement


What speed you have to run on the equator to weigh as much as possible (the greatest weight) if you do
choose the right direction? Do not consider relativity.

Homework Equations


ravitational acceleration is 9.78 m/s2 at the equator and 9.83 m/s2 at the poles, so you weigh about 0.5% more at the poles than at the equator.

The Attempt at a Solution


Absolutely don't know :D
 
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  • #2
Johny158 said:
ravitational acceleration is 9.78 m/s2 at the equator and 9.83 m/s2 at the poles, so you weigh about 0.5% more at the poles than at the equator.

That's not really relevant to this question. This isn't about the difference between the poles and equator.

Sorry I should correct my initial reply. Gravitational force is actually about the same at the equator and the poles. The net force acting on you is different at the equator and poles.

Hint: It's about an effect that occurs at all latitudes except the poles and how you could reduce this effect?

Hintt 2: The Earth isn't a perfect sphere. Why?
 
  • #3
CWatters said:
Gravitational force is actually about the same at the equator and the poles.
Well, it is about 0.2% less at the equator, but as you say the apparent gravitational force (the ratio between weight and mass) is about 0.5% less.
 
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1. How does running at the equator affect weight gain?

Running at the equator does not directly affect weight gain. However, the Earth's rotation causes a centrifugal force that is greatest at the equator, making objects weigh slightly less than they would at the poles.

2. Can running at the equator make you gain weight faster?

No, running at the equator will not make you gain weight faster. Weight gain is determined by caloric intake and expenditure, not location.

3. Is it easier to run faster at the equator?

Theoretically, it could be easier to run faster at the equator due to the reduced weight caused by the centrifugal force. However, this effect is very small and likely not noticeable for most people.

4. Does the Earth's rotation affect running performance?

Yes, the Earth's rotation does have a small effect on running performance due to the centrifugal force at the equator. However, this effect is minimal and likely not noticeable for most people.

5. Is there any scientific evidence to support the claim that running at the equator can help you weigh more?

There is no scientific evidence to support this claim. Weight gain is determined by caloric intake and expenditure, not location. Additionally, the difference in weight caused by the Earth's rotation is very small and would not have a significant impact on overall weight.

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