A violin has a string of length 0.320 m, and transmits waves at
622 m/s. At what frequency does
it oscillate?
(Unit = Hz)

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.