Smart city technology can be almost invisible to their residents, and many people may not be aware of how technology is boosting safety, livability and more in these cities. What's one current or coming technology that is changing or will change how cities work?

answerthe above statement is (true);

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.

browsing like internet search? don't look at anything stupid. or set up restrictions on ur device's search engine. and if something suspicious comes up don't be dumb and click on it. i hope that's what ur question meant.