What happens when two charged objects physically contact each other?

If a negative object is used to charge a neutral object, then both objects become charged negatively if this answer is wrong I'm sorry.

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

truck y has a greater velocity than truck x.