Moving a spring toy up and down will create what kind of disturbance? parallel to the wave motion

in a circular motion

in the same direction as the wave motion

perpedicular to the wave motion

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.