When the ruler is sticking out further from the edge of the table, it is more easily influenced by external forces such as air currents, causing it to vibrate more. The longer unsupported length of the ruler also allows it to bend more easily, contributing to the increased vibrations.
The first line, not the edge of the ruler.
Assuming the man stands at the edge of the table, he can stand up to 1/3 of the table's length from the right edge, which would be around 19 inches from the edge for a 56-inch table. However, the distribution of weight and stability of the table base can also affect this distance.
The border or margin of a table or bed is typically referred to as the "edge."
In measuring a table, "depth" refers to the distance from the front edge to the back edge, essentially indicating how far back the table extends. It is an important dimension for determining how much usable space is available for placing items on the surface. Depth is typically measured perpendicular to the table's width and height.
If you want to measure the length, use a ruler.
When you twang a ruler on the edge of a table, you create vibrations in the ruler. These vibrations disturb the surrounding air molecules, generating sound waves that travel through the air. The frequency of these vibrations determines the pitch of the sound you hear. Essentially, the ruler's motion converts mechanical energy into sound energy.
A ruler is a straight edge
the edge
A ruler is a straight edge
A ruler can be classed as a straight edge.
horizontal ruler
Called a straight edge
A Ruler
Horizontal ruler
You could align the edge of the object with the zero on the ruler and then read off the marking on the ruler which aligned with the other end of the object.
Straight Edge
Along the edge.