Suppose a diving board with no one on it bounces up and down in a simple harmonic motion with a frequency of 4.25 Hz. The board has an effective mass of 8.5 kg. What is the frequency, in hertz, of the simple harmonic motion of a 71.5-kg diver on the board?

Afisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. it takes a time of 2.70 s for the boat to travel from its highest point to its lowest, a total distance of 0.700 m. the fisherman sees that the wave crests are spaced a horizontal distance of 6.50 m apart. a. how fast are the waves traveling? b. what is the amplitude a of each wave?