If the earth suddenly shrinks (without changing mass) to half of its present radius, the acceleration due to gravity will be
$g/2$
$4g$
$g/4$
$2g$
Derive the equation for variation of $g$ due to height from the surface of earth.
How much radius of earth at equator is grater than the radius at poles of earth ?
As we go from the equator to the poles, the value of $g$
Explain the variations of acceleration due to gravity inside and outside the earth and draw the graph.
Obtain general equation of gravitation force at distance $r$ from the centre of earth and derive the equation of acceleration due to gravity on the surface of earth.