When you arrive at work one morning, your inbox is full of messages complaining of a network slowdown. you collect a capture from your network monitor. what can you compare it to in order to determine what has changed?

You can compare it to the network baseline

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.