My Math Forum  

Go Back   My Math Forum > Math Forums > Math

Math General Math Forum - For general math related discussion and news


Thanks Tree2Thanks
  • 2 Post By skeeter
Reply
 
LinkBack Thread Tools Display Modes
January 15th, 2017, 08:54 AM   #1
Newbie
 
Joined: Jan 2017
From: Warrington

Posts: 2
Thanks: 0

Ship problem

Hi, complete new comer to this forum and not quite sure this is the right place to ask a new question? Here goes anyway:

If a ship steams southeast at 20 knots across a current flowing towards 060° at 2 knots, what is its position relative to its starting position after 1 hour?

I'm assuming it's going to be easiest to solve with a vector diagram, I'm just not quite sure how you'd draw it.

Thanks in advance.
sgjaskey1 is offline  
 
January 15th, 2017, 09:25 AM   #2
Math Team
 
Joined: Jul 2011
From: Texas

Posts: 2,656
Thanks: 1327

Relative to the +x-axis, SE is (-45 degrees) and direction 060 is (30 degrees)

ship's path relative to the water + current = ship's path relative to the Earth

$\vec{S} + \color{blue}{\vec{C}} = \color{red}{\vec{E}}$

you can solve this using the Law of Cosines/Sines, or you can solve it using the method of vector components.

sketch attached ...
Attached Images
File Type: jpg vector_ship.jpg (6.5 KB, 4 views)
Thanks from greg1313 and sgjaskey1
skeeter is offline  
Reply

  My Math Forum > Math Forums > Math

Tags
math, problem, ship



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
finding the relation ship between x and y akur Algebra 8 April 1st, 2011 03:26 PM
Sine Law: Ship Question millerst Trigonometry 4 April 3rd, 2008 10:39 AM
Ship Distance From Shore symmetry Algebra 2 July 26th, 2007 01:57 PM





Copyright © 2017 My Math Forum. All rights reserved.