Suppose that angular velocity of rotation of earth is increased. Then, as a consequence :

Options

A. Weight of the object everywhere on the earth will decrease
B. Weight of the object everywhere on the earth will increase
C. Except at poles weight of the object on the earth will decrease
D. There will be no change in weight anywhere on the earth.

Answer

C

Explanation

Acceleration due to gravity on the surface of the earth in terms of latitude `phi` can be approximately written as follows :
`g. = g - omega^(2) r cos^(2) phi`
We can see that acceleration due to gravity at poles `(phi = 90^(@))` is not affected by angular speed `(omega)` of the earth or everywhere else it will decrease on increasing `omega`. Hence option (c ) is correct.