Progressive Wave: Motion of Particles on Pulse

[Mahasweta]

1. A sinusoidal progressive pulse is generated on a string. The pulse is moving in positive x-axis.



2. What will be motion of the particles on the pulse.



3. Points in the front part moving towards positive y-axis and the rear part points will move along negative y axis.

 

[haruspex]

Not sure what pulse implies here. Is it a quarter wave, a half wave or a whole one? E.g. a quarter wave would leave all points displaced from original position.