Match the instruments with their uses.
tiles-
microscope-
streak plate-
telescope-
ruler-
(pairs)
1.identify the mineral composition
of a rock
2.view planets, stars, and objects
in space
3.measure the length of a piece
of paper
4.study a petri dish containing
bacteria

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.