(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A friendly Brazilian has a mass of 150 kg. Being in Brazil, he rotates in a circle around the center of the earth once per day, The radius of this circle (which is essentially the radius of the Earth) is 6.40 x 10^6 m.

I have found that the normal force is 1.4649 x 10^3.

2. Relevant equations

a_{c}= v^{2}/r , centripetal acceleration

[itex]\Sigma[/itex]F=ma

v = (2[itex]\pi[/itex]r)/T , T is period of one revolution

3. The attempt at a solution

I only got to mg - F_{n}= ma_{c}

I know what the apparent weight is but I'm not sure about the normal force. If I can find this, then I can then find a_{c}, v, and then T to find about the length of day.

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# Homework Help: Rotation Problem: Earth lengths/Apparent Weights

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