Since the earth is spinning, wouldn't centrifugal force make us lighter?

[ben328i]

so here is my questions
since the Earth is spinning, wouldn't centrifugal force make us lighter?
if we were not spinning would we be heaver?
how come i do not have gravity?
what is gravity

 

[Integral]

so here is my questions
since the Earth is spinning, wouldn't centrifugal force make us lighter?
if we were not spinning would we be heaver?

Yes, it does. You are lightest on the equator, no change at the poles.

how come i do not have gravity?

You do.

what is gravity

In 25 words or less?

 

[mgb_phys]

Yes, it does. You are lightest on the equator, no change at the poles.

Even more so because the centrifugal force makes the Earth bulge out at the equator so you are further form the centre and so gravity is also less.

 

[ben328i]

Yes, it does. You are lightest on the equator, no change at the poles.

You do.


In 25 words or less?

how do i have gravity?
sure make it 26 since your such a sweetheart

 

[munky99999]

how do i have gravity?
sure make it 26 since your such a sweetheart

anything with mass has gravity. Your mass is so small that its negligible. Which is why things aren't orbiting you.

Gravity=(G * m1 * m2) / (d^2)

G= 6.67300 × 10^-11
m1=your mass in kg.
m2=mass of other thing(such as the earth) in kg.
d=distance in metres

 

[CaptainQuasar]

Everything with mass also has gravity.

⚛​

 

[mgb_phys]

Everything with mass has gravity - you attract the Earth slightly, just as the Earth attracts you.

 

[CaptainQuasar]

…you attract the Earth slightly, just as the Earth attracts you.

You and the Earth, sitting in a tree… ❤

⚛​

 

[Cyrus]

Just incase he didnt get it in 3 posts:

"Everything with mass also has gravity"

P.S. - Everything with mass also has gravity.

Side: Everything with mass also has gravity

Note: Everything with mass also has gravity

ref:

[1] "Everything with mass also has gravity", CaptainQuasar, et al.

(Sorry, I just thought it was funny that the same thing was reposted 3 times in a row; just incase he didnt get it the first two times.)

However, "sure make it 26 since your such a sweetheart" is priceless :rofl:

 

[ben328i]

Just incase he didnt get it in 3 posts:

"Everything with mass also has gravity"

P.S. - Everything with mass also has gravity.

Side: Everything with mass also has gravity

Note: Everything with mass also has gravity

ref:

[1] "Everything with mass also has gravity", CaptainQuasar, et al.

(Sorry, I just thought it was funny that the same thing was reposted 3 times in a row; just incase he didnt get it the first two times.)

However, "sure make it 26 since your such a sweetheart" is priceless :rofl:

so mass has gravity you say?


anyway, how can you prove that i have gravity?

 

[Cyrus]

Becuase your attracted to me.

 

[russ_watters]

so mass has gravity you say?

anyway, how can you prove that i have gravity?

Stand on a scale.

 

[binzing]

Looks like its been answered, time to close it.

 

[jhicks]

I remember doing a calculation about your first point once. Assuming several idealized things, I calculated that the difference between the force we feel at the poles compared to the equator is about 0.02m/s^2.

 

[tribdog]

I remember doing a calculation about your first point once. Assuming several idealized things, I calculated that the difference between the force we feel at the poles compared to the equator is about 0.02m/s^2.

If you could stand on the outside edge of Jupiter at the equator, what would the difference be? doesn't Jupiter have something like an 8 hour day?

 

[CaptainQuasar]

If you could stand on the outside edge of Jupiter at the equator, what would the difference be? doesn't Jupiter have something like an 8 hour day?

Everything would be different in that case because not only is Jupiter spinning faster but it's more massive and larger.

There would be relative difference between what you'd weigh at Jupiter's equator versus its poles as there is a relative difference between what you'd weigh at Earth's equator versus its poles. But because you're swinging through a tighter curve on Earth, even though it would involve slower motion than on Jupiter, I think you'd have to do all of the calculations to figure out on which planet the relative difference would be greater.

⚛​

 

[D H]

I remember doing a calculation about your first point once. Assuming several idealized things, I calculated that the difference between the force we feel at the poles compared to the equator is about 0.02m/s^2.

You're off by a bit. Centrifugal acceleration is $r\omega^2$, where $r$ is the distance from the axis of rotation. At the equator, $r=6378\,\text{km}$, and at the poles, $r=0$. Using the fact that the Earth makes one revolution in one sidereal day, $6378\,\text{km} *(2\pi/\text{sidereal day})^2 = 0.034\,\text{m}/\text{s}^2$.

Just let the Google calculator does the work for you:
http://www.google.com/search?hl=en&...+*+(2+pi+radians/sidereal+day)^2&btnG=Search"


However, this is not the end of the story. A person at the equator is further from the center of the Earth than someone at one of the poles due to the Earth's equatorial bulge. This further reduces the gravitational attraction at the equator. The Earth's equatorial bulge is due to the Earth's rotation about its axis. You need to factor the bulge in as well if you want a full accounting of the effects of the Earth's rotation rate. This raises the effect of rotation on sensed acceleration from 0.034 m/s² to 0.052 m/s², or about 0.5% of the gravitational acceleration.

 

[jhicks]

Sorry when I gave that figure I wasn't intending to be accurate. The 1 sig fig was more or less to emphasize how small of a difference the value is relative to the pull due to gravity.

 

[Poop-Loops]

If you're within an order of magnitude, you're correct enough. ;)