Now, try to visualize each bead in the string connected to the adjacent bead by a little section of spring or elastic. With that image in mind, describe in your own words how a wave physically propagates on a string.

Here we consider the propagation of a transverse wave on a string.

In a transverse wave, the vibrations of the beads in the string occur in a direction perpendicular to the direction of propagation of the wave.

This means that, if the string is horizontal, the wave in the string propagates from left to right (for example), while the beads in the string move up and down, in the vertical direction (so, perpendicular to the direction of propagation).

The propagation of the wave occurs because when one bead starts moving up, then it "pulls" the adjacent bead also upward (because the two beads are connected). The second bead also pulls its adjacent bead upward, and so on. As a result, each bead does not move horizontally, but only vertically; so there is no transfer of matter in the wave. However, the vibration is transmitted horizontally along the string, therefore we say that the energy is transmitted in the horizontal direction (the direction of propagation of the wave).

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

i think it's 35 meters