Effect of the earth's rotation on weight at the equator

1. A.
   $\sqrt{\frac{2g}{5R}}$
2. B.
   $\sqrt{\frac{3g}{5R}}$
3. C.
   $\sqrt{\frac{5R}{3g}}$
4. D.
   $\sqrt{\frac{3}{5}gR}$

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1. A.
   $\frac{1}{80}$
2. B.
   $\frac{1}{400}$
3. C.
   $\frac{1}{800}$
4. D.
   $\frac{1}{1600}$

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1. A.
   $\left(\dfrac{R}{3g}\right)^{\frac{1}{2}}$
2. B.
   $\left(\dfrac{2g}{5R}\right)^{\frac{1}{2}}$
3. C.
   $\left(\dfrac{5g}{9R}\right)^{\frac{1}{2}}$
4. D.
   $\left(\dfrac{3g}{2R}\right)^{\frac{1}{2}}$

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1. A.
   $\sqrt{\dfrac{3}{5}gR}$
2. B.
   $\sqrt{\dfrac{2g}{5R}}$
3. C.
   $\sqrt{\dfrac{3g}{5R}}$
4. D.
   $\sqrt{\dfrac{5R}{2g}}$

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