A boat at anchor is rocked by waves whose crests are 40 m apart and with wave speed 10 m/s. These waves reach the boat once every
A)400 s.
B)30 s.
C)4.0 s.
D)0.25 s.

Question

Quizplus · Accepted Answer

The time it takes for a wave to reach the boat is the wavelength divided by the wave speed. Here, the wavelength is 40 m and the wave speed is 10 m/s. So, the time is 40 m / 10 m/s = 4.0 s.

A Boat at Anchor Is Rocked by Waves Whose Crests