electromagnetic heat longitudinal transverse
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Five bowling balls are lined up touching one another on a smooth surface. Striking the first ball with a hammer makes the fifth ball move away from the group. The force of the hammer was transmitted through the line of balls as what type of wave?
Possibilities:
- electromagnetic
- heat
- longitudinal
- transverse

longitudinal