value of gravitational force

a

Noone is going to do your homework, but here is a site that can provide some answers by available theory and data.http://www.splung.com/content/sid/2/page/gravitation

Traveling toward the center of the earth it would first increase, but at some point equalize... Even gravity above the earth is not constant... Gravity is higher near dense bodies like Iron fields...

look at the graphs

Newtons law of universal gravitation: F = G x ((first mass x second mass) / R x R)

R is the distance between the mass centers so as you got closer to the earth's center the force would increase.

Remember that the MAss of the earth is all BENEATH you when you use G(Mm)/r^2 while at the earths surface. So some things change as you go into the earth
ARe parts of the Mm values different as you burrow down into the earth? or are the r values the only things that change?

In other words, as you burrow into the earth isnt an increasing amount of the value of the mass above you the deeper you go ?