3. When a 60 kg person gets into a 300 kg boat the boat sinks about...
1) A person starts rocking a boat at a steady rate, thus producing sinusoidal waves on the surface of the water. This person causes the boat to oscillate 72 times per minute, each oscillation producing a wave crest 9 cm above the undisturbed level of the water. The waves reach the shore (24 m away) in approximately 10 seconds. At a given instant, approximately how many wave crests are there between the boat and the shore?