Question

If the earth stops rotating about its axis, then the magnitude of gravity

• A. Increases everywhere on the surface of earth
• B. Will increase only at the poles
• C. Will not change at the poles
• D. All of the above

Answer 1

The correct option is C

Will not change at the poles

Due to rotation and earth, $g_{eff}$=g- R${\omega }^2$ $co{s}^2\varphi$ , where $\varphi$ = ${90}^o$ at poles $g_{eff}$ = g, which do not depend on rotation of earth.