Question

Two canoes are 10 m apart on a lake. Each bobs up and down with a period of 4.0 s. When one canoe is at its highest point, the other canoe is at its lowest point. Both canoes are always within a single cycle of the waves. Determine the speed of the wave.

• A. 2.5 m/s
• B. 5 m/s
• C. 40 m/s
• D. 4 m/s

Answer 1

The correct option is B 5 m/s


Frequency of wave $=\frac{1}{4}Hz$
Wavelength of wave $=\lambda =2\times 10=20m$
Velocity of wave $=f\lambda =5m/s$