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1. The problem statement, all variables and given/known data

Determine the angular speed with which the Earth would have to rotate on its axis so that a person on the equator would weigh 75% of their present weight (Radius of the Earth is 6400 km)

2. Relevant equations

wf=2pi/T

wt= mg

v=wr

3. The attempt at a solution

First I did wt=0.75 x m x 9.8, the problem is i cant find any equation that could incorporate weight and angular speed. Can somebody please give me some hints? Any help would be appreciated:) Thankyou very much

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# Angular Speed of Earth when

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