FunTrivia Homepage New Questions Unanswered Post a Question Goto Qn # Archives

# If the earth were to suddenly start rotating faster, would it have any effect on our weight and, if yes, what?

Question #59689. Asked by chunawalla. (Oct 01 05 11:23 AM)

anela19

Yes, we would weigh less.

 Oct 01 05, 3:10 PM
Arpeggionist

Only our apparent weight would be slightly diminished. This explains why creatures as large and cumbersome as the saurpodian dinosaurs managed to move around and survive in an era when the rotation of the earth was much faster (and its orbit was slightly shorter as well). But it would have to be a lot faster to really affect objects in a very significant way. I think the speed of the rotation of the planet has more of an effect on wind and water currents than on living beings. (Jupiter's Big Red Spot is stronger than anything which could happen on Earth, and its rotation is extremely fast.)

 Oct 01 05, 4:18 PM
gmackematix

It's an interesting idea, Arpy. Do you have a site that claims the difference between the Earth's rotational speed now and 65 million years ago is enough to have made the mobility of dinosaurs significantly more than it would be today?
Our actual weight is the gravitational force acting on us, which is dependent on our distance from the Earth's centre of mass and the relative masses of us and the Earth, neither of which would change with the Earth's rotational speed.
So our actual weight would remain the same.

Our apparent weight also depends on the centrepetal force on us by virtue of the Earth's rotation. This force pushes up on us away from the Earth's centre of rotation proportional to our mass and the square of rotational speed and is inversely proportional to our distance from the centre of rotation.
As the rotational speed is small (one rev per 24 hrs) and the distance is great, then this force is tiny. Even if the Rarth span twice as fast, the centripetal force would not be much greater but our apparent weight would be ever so slightly less.

 Oct 02 05, 5:49 PM
gmackematix

Sorry, my mind wanders back to planet Rarth on occasion, but the same applies to Earth.

 Oct 02 05, 5:53 PM
gmackematix

And do you think if I keep my head down, nobody will notice my confusion between speed and angular speed in my argument?

 Oct 02 05, 5:56 PM
peasypod

Nothing goes unnoticed around here gmack, but being the polite gal I am....And of course there's that Brief Moment in Time when you were Whistling Dixie on the Planet Rarth, that may have something to do with it...

 Oct 02 05, 6:58 PM

### Other Similar Questions & Answers

 What effect would take place to the earth if the sun stopped rotating?

### Suggested Related FunTrivia Quizzes - 90,000 currently online

1 4.4 "The Weight"
 All of these questions pertain to the episode titled, "The Weight", which was the fourth episode of season four. Good luck!
'Sopranos'- Season 4 Average
10 Q
CAGuy0206
Oct 03 09
213 plays
2 "Yes!"
 This is a quiz to honor our favorite green Underworld creature, Fred Fredburger, from the TV show "The Grim Adventures of Billy and Mandy." Have fun!
Grim and Evil Average
10 Q
jkidd13
Sep 14 07
339 plays
3 And Then There Were 99
 Many people do a special quiz when they reach 100. I chose to do something special to celebrate my 99th quiz.
51-100 Average
15 Q
bookworm78
Aug 13 07
2013 plays

"Ask FunTrivia" is for entertainment purposes only, and answers offered are unverified and unchecked by FunTrivia. We cannot guarantee the accuracy or veracity of ANY statement posted. Feel free to post an updated response if you feel that an answer is inadequate or incorrect. Please thoroughly research items where accuracy is important to you using multiple reliable sources. By accessing our website, you agree to be bound by our terms of service.