Which equation is used to prove objects accelerate at the same rate towards the earth regardless of their mass in the absence of air? GM/R^2
GM_1M_2/R
GM/R
GM_1m_2/R^2

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

80cm/s.

24cm/s.

53.3cm/s.