What frequency is monitored by the leading ship?

• jpnnngtn

jpnnngtn

This problem here is rather tough (to me). Perhaps you can help:

Two ships are moving along a line due east. The trailing vessel has a speed of 64.0 km/h relative to a land based observation point, and the leading ship has a speed of 45.0 km/h relative to the same station. The two ships are in a region of the ocean where the current is moving uniformly due west at 10.0 km/h. The trailing ship transmits a sonar signal at a frequency of 1200 Hz. What frequency is monitored by the leading ship? (Use 1520 m/s as the speed of sound in the ocean)

Hi,

As per Forums policy, I need you to show me how you started and where you got stuck.

Thanks,

Hi jpnnngtn,
you have probably already found out that the ships' speeds relative to the medium are 74 km/h and 55 km/h respectively. I think you should look up 'Doppler effect' in your script/book, and see where that gets you. If you are still stuck, then please tell us what the difficulty is.

I stayed up and solved this one last night. I think i just needed to take a break and come back to it later.