Wednesday

November 26, 2014

November 26, 2014

Posted by **Anonymous** on Saturday, December 11, 2010 at 4:05pm.

- Math -
**MathMate**, Saturday, December 11, 2010 at 6:05pmAdd up each component (north or east) separately, and finally find the distance by the vectorial sum (using Pythagoras).

North: 3-1=2km

East: 2+4=6

Distance = √(2²+6²)

=√(40)

=2√(10)

- Math -
**Triquenita**, Saturday, December 11, 2010 at 7:41pmI don't understand where for North you put 3-1. The boat moved 1km South and 3km North. Is that how this was done?

- Math -
**MathMate**, Saturday, December 11, 2010 at 9:05pmIn vectors, directions are

*signed*.

This means that if we take the positive direction as north, then going south is backwards, and is thus represented as negative. Otherwise it would not make a difference between going 3 km north and 1 km north (3+1), and going 3 km north and 1 km south (3-1).

Hope that clarifies how it's done.

- Math -
**efrata**, Thursday, October 2, 2014 at 2:08pmsimilar to other

**Answer this Question**

**Related Questions**

math - A boat starts at point A, moves 3 km due north, then 2 km due east, then ...

math - what distance formula would you use to solve this problem? A boat starts ...

math - a boy travels 15 km due north,then goes 9 km due east,then 3km due south....

Geometry - A boat starts at point A, moves 3 km due north, then 2 km die east, ...

Physics - I am having trouble figuring out this question: Part 1: A long staight...

Phys 2 - I am having trouble figuring out this question: Part 1: A long staight ...

Please Please Help-Physics - I am having trouble figuring out this question: ...

physics - A 316-kg boat is sailing 12.0° north of east at a speed of 1.60 m/s. ...

Physics - A 343-kg boat is sailing 16.2° north of east at a speed of 1.98 m/s. ...

physics - A 358-kg boat is sailing 15.9° north of east at a speed of 1.80 m/s. ...