Why is velocity a vector quantity

velocity is called vector quantity because it has both magnitude and direction.

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more

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.