Earth's rotational speed when its gravity is 5.0m/s2

amosor

What will be the rotational speed of the Earth when gravity would be
only 5.0m/s2

russ_watters

Why would it be different? Since this is a contrived hypothetical, you'll need to explain...Are you assuming its rotational momentum is the same and its inertia is different?

cesiumfrog

Odd question. Use of an arbitrary number implies homework. Maybe the OP misparaphrased something like "how much would the earth's spin need increase, in order to halve effective gravity at the equator"?

amosor

Quote by cesiumfrog

Odd question. Use of an arbitrary number implies homework. Maybe the OP misparaphrased something like "how much would the earth's spin need increase, in order to halve effective gravity at the equator"?

Yes, you express my question more precisely. Will you be kind to help me to calculate this speed and show me the way you do it?
Thanks.

amosor

Yes, you express my question more precisely. Will you be kind to help me to calculate this speed and show me the way you do it?
Thanks

russ_watters

Well, do you know the equation for centripetal acceleration and the radius of the earth...?

hover

use google to help you out.

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amosor	Earth's rotational speed when its gravity is 5.0m/s2 Tweet What will be the rotational speed of the Earth when gravity would be only 5.0m/s2

russ_watters Mentor	Why would it be different? Since this is a contrived hypothetical, you'll need to explain...Are you assuming its rotational momentum is the same and its inertia is different?

cesiumfrog	Odd question. Use of an arbitrary number implies homework. Maybe the OP misparaphrased something like "how much would the earth's spin need increase, in order to halve effective gravity at the equator"?