How different types of waves transfer energy waves transfer energy by vibrating
particles of a medium.
waves can transfer energy
through empty space.
Example:
Example:

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.