Question

why is the weight of the object more at the poles than at the equator

Answer 1

As we know
$g = GM \div r ^{2}$
n *g* is inversely proptional to square of radius

radius being more at equator and less at pole.

Thus *g*is less at equator as compared to pole

Answer 2

here is your answer

The effective acceleration of gravity at the poles is 980.665 cm/sec/sec while at the equator it is 3.39 cm/sec/sec less due to the centrifugal force. If you weighed 100 pounds at the north poleon a spring scale, at the equator you would weigh 99.65 pounds, or 5.5 ounces less.

hope it's may help u