In most diagrams, you want to show some sort of connection between objects. You could use Draw or Impress' array of arrows, but if you ever need to reposition objects, you will need to reposition the ...

Show the forces acting on an object in a free body diagram. The arrows represent the size and direction of the forces acting. When drawing a force diagram: represent the object with a small box or dot ...

Show the forces acting on an object in a free body diagram. The arrows represent the size and direction of the forces acting. When drawing a force diagram: ...