What happens when you film your screen?

An combination of light and submition happens and it trigers the Abacumus of the materials used.

that without the operating systems you would have to control and synchronize computer hardware.

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.