http://www.trailfire.com/MacBack/trails/32141MacBack/trails60http://www.trailfire.com/MacBack/marks/76705Enter the gravitational worldMacBackMon, 26 Mar 2007 07:36:23 -0700trailfire:markId:76705http://www.trailfire.com/MacBack/marks/76706Why will gravitational force decrease as we go deeper inside the earth's core? Asker answers this question. Here's how:Actually, if Earth had a small hollow core, and you were inside of it, you would not feel any gravitational pull by the thick shell. It's a quirk of mathematics that it works out that way.

]]>Enter the gravitational worldMacBackMon, 26 Mar 2007 07:39:34 -0700trailfire:markId:76706http://www.trailfire.com/MacBack/marks/76710M1is the mass of the first object (in kilograms), M2is the mass of the second object (in kilograms), k is a gravitational constant always equal to 6.67 x 10 11 newton m2/kg2, and the pro duct of all three is divided by the square of the distance, d (in meters), between the two objects.

]]>Enter the gravitational worldMacBackMon, 26 Mar 2007 07:43:22 -0700trailfire:markId:76710http://www.trailfire.com/MacBack/marks/76712Enter the gravitational worldMacBackMon, 26 Mar 2007 07:44:33 -0700trailfire:markId:76712http://www.trailfire.com/MacBack/marks/76713Enter the gravitational worldMacBackMon, 26 Mar 2007 07:47:43 -0700trailfire:markId:76713