Question

If i drop an object what force is acting upon it in our normal air and in a vaccum ????

Answer 1

In normal air we have viscous force, buoyant force, air resistance.

In vacuum we don't have those.

Answer 2

When in normal air both gravity and air resistance are acting upon the object.

In vacuums nearly all air has been removed causing the friction caused my air resistance to be removed as well. So really the only force acting upon it is gravity I believe. ._.

Just adding on to the above comment, which was indeed correct also. :3