A buoy in the ocean completes full up-and-down oscillations in

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

A buoy in the ocean completes

15

full up-and-down oscillations in

45\,\text{s}

. At the same moment, a swimmer located

60\,\text{m}

directly along the line of wave travel from the buoy observes that exactly

5

complete wavelengths span the distance between them. What is the speed of the ocean waves? (a)

8\,\text{m}\,\text{s}^{-1}

(b)

4\,\text{m}\,\text{s}^{-1}

(c)

2\,\text{m}\,\text{s}^{-1}

(d)

5\,\text{m}\,\text{s}^{-1}