Question

Why body weight is more at poles than equator? One reason is the gravitational force which is more at the poles. What is the other important factor?

Answer 1

Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

Answer 2

hmmmm.... i wonder if there is not as much centrifugal force there. Or maybe its that youre so cold that you 'densify' :)

Answer 3

I think in this problems, if we consider that earth is a particle and solve the problem by central mass, we find the answer.
F =(GmM) div (R ^2)
m=your mass; M= mass of earth; r=distance between you and centr of mass.
centr of mass is the point that moves as all of the mass were concentrated there and all external forces were applied there.

Answer 4

p.s: I apologize because of my bad English!

Answer 5

Body weight is less at the equator due to the centrifugal force. If we consider the forces acting on any point of equator, gravitation force(G) acts downward and centrifugal force(C) acts upwards. The resultant force experience is (C-G) at the equator, but in the poles it is just -G. Hence Body Weight is greater at poles.

Answer 6

body weight is simply m*g . this formula is based on the stationary frame wrt earth. the mass remains constant . the value of the gravitational force of attraction is high wen ur closer to the source.near the poles the distance from the centre of mass of earth is less and hence greater force acts on u. the force on u by earth is ur weight. so higher is ur weight near poles :)

Answer 7

So centrepetal force ISN'T greater at the equator? I like Brakett's answer. I betcha centerpetal is fairly negligible. I mean, we are going about 1000 mph or less (further we are from the equator), but at that radius it is not much of a force. If we were going 1000mph at say a 1 mile radius, then whew, significant centrepetal force, but we're at more like 4000 miles, that's F=mv^2/r, a bout 7/10 of a pound. I dunno, that's something if you're playing Biggest Loser, I guess.

Answer 8

I like Brakett's answer, too.

Answer 9

the spin of the earth bulges the equator; so the shape of the earth is not a perfect sphere; so centrifugal force does play a role :) I wonder how dizzy you get if you stand at the poles ......