Question

solve this question​

Answer 1

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option (1)

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acceleration at equator

$g_e = g - R {\omega_ \circ}^{2} \:$

where R is radius of earth and g is acceleration due to gravity

given body feel weightlessness

$g_e = 0 = g - R {\omega_ \circ}^{2} \:$

$\rightarrow \: g - R {\omega_ \circ}^{2} = 0\\ {\omega_ \circ} = \sqrt{ \frac{g}{R} } \:$