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explain the application of centripital in context of earth's rotation. need it in urgent

Answer 1

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10 Real Life Examples of Centripetal Force in Action

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Posted by: Quenton Lind on April 6, 2021 at 7:30 AM

Whether or not you’ve ever heard of centripetal force before, you’ve definitely seen it in action, and even felt it in your entire body.

In fact, you’re probably using centripetal force more often than you realize. Even some of your home appliances help you use it for everyday tasks (more on that later).

As common as this force is, though, not everyone entirely understands the nuances surrounding the physics of centripetal force. So before we list some cool examples of science in action, let’s take a quick look at what centripetal force is (and what it isn’t).

Centripetal vs Centrifugal Force

Answer 2

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Yes, the rotation of the Earth would tend to reduce the weight of objects due to the so-called “centrifugal force” (which is really just inertia), but if you work out the amount of apparent force, you’ll find that it’s insignificant. (Not that the effect of the equatorial bulge is all that great either…) It sounds like the Earth’s rotational speed is huge - about 1,000 MPH at the equator - but remember, the Earth is a very, very large object and it still takes a full day to turn just once around. And centrifugal force depends on the angular velocity and the radius (in this case, the distance from the center of the Earth), as

F = m(w^2)r

(that “w” is supposed to be the small Greek letter omega, the angular velocity in radians/second; the Earth’s rotation is at a rate of about 7.3 x 10^-5 rad/sec.)

Let’s assume a mass of 100 kg and the radius of the Earth as 6.38 x 10^6 meters. At the aforementioned angular velocity, the centrifugal force experienced by this object would then be

(100 * (7.3 x 10^-5)^2)*6.38 x 10^6 = 3.4 Newtons

3.4 N is about three-quarters of a pound, and our 100 kg mass might be a 220-pound man - so at the equator, he’s lost all of twelve ounces, or about 0.34% of his weight. Not a whole lot.

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