Hey there,
Friction is important to increase the friction between the bars and the gymnast to prevent the gymnast from falling and hurting themselves.
Hope this helps :))
<em>~Top♥</em>
Answer:
energy can move from one location to another, the particles of matter in the medium return to their fixed position. A wave transports its energy without transporting matter.
Missing an attached sheet with the sound waves. Please add the attached sheet so I can properly help.
Thanks! :D