Recent content by ++A++

A point mass of 3.8kg is on the x-axis at x=8.2 and an equal point mass is on the y-axis at y=5.9. What is the magnitude of the gravitational field from these two masses at the origin? Well for this problem I tried using the equation F= G m1 m2/ r^2 for r I added 8.2 and 5.9 for G I...

I got it! I added the Earth's radius (6.37E+6) to the radius above the Earth's surface and used it in my equation to get the right answer (1.09). Thank you very much for the help!

Question on Gravity Keplers Laws? An object is dropped from a height of 1.27E+7m above the surface of the earth. What is its initial acceleration? I thought I could use the equation for objects near the surface of the Earth in free fall which is : g (or a) = GM / R^2 But this doesn't...