i believe it is called oscillation
Oscillation
This is called "pitch."
Those would be transverse waves!
Quick sand come from the old Middle English where 'quick' meant 'alive' or lively. Quicksand is surely more lively than dry sand!
Friction
Bob
Bob
BOB BOB BOB
Oscillation
You just move the neck of the guitar in a quick up and down motion
rotary motion
Motion Perpendicular to the ground is called horizontal motion.
This is called "pitch."
It is called a hand wave or a flat wave when your palm is facing down and you move your fingers in a waving motion.
Slowly move your shoulders up then in a quick motion move them down and run while screaming bloody murder.
A car
Those would be transverse waves!