Question

The rotation of the earth having radius r about it's axis speeds up-to a value such that a man at latitude angle 60° feels weightlessness.the duration of the day in such case is

Answer 1

Use

g' = g +Rw^2(cosx)^2

(g'=0 , x=60° , g=force of gravity)

w=2π/T than calculate T ..

Answer 2

Answer:

8 Π √( R / g)

Explanation:

Missing options in answer :-

The rotation of the earth having radius r about it's axis speeds up-to a value such that a man at latitude angle 60° feels weightlessness.the duration of the day in such case is

1) 8 Π √( R / g)

2) 8 Π √( g / R )

3)  Π √( R / g)

4) 4 Π √( g / R )

Answer :-  8 Π √( R / g)