Which of the following actions would make a pulse travel faster along a stretched string?

Options

A. Move your hand up and down more quickly as you generate the pulse.
B. Use a heavier string of the same length, under the same tension.
C. Use a lighter string of the same length, under the same tension.
D. Stretch the string tighter to increase the tension.

Answer

C, D

Explanation

The wave speed depends on propertices of the medium, not on how you generate the wave. For a string `v=sqrt(T_(s)//mu)` Increasing the tension or decreasing the linear density (lighter string) will increase the wave speed.