# Finding missing components given speed and direction.

1. Jul 19, 2011

### bling-bling

1. The problem statement, all variables and given/known data
#26 (on attachment). The speed of an object and the direction in which it moves constitute a vector quantity known as the velocity. An ostrich is running at a speed of 17.0 m/s in a direction of 68 degrees NW. What is the magnitude of the ostrich's velocity component that is directed (a) due north and (b) due west?

2. Relevant equations
R2 = A2 + B2 – 2ABcosθ
x: (hyp)(cosθ)
y: (hyp)(sinθ)

3. The attempt at a solution
I have no idea what do to. This is my summer assignment for ap physics and ive not taken pre-cal or cal or physics before so im confused. i have a couple more problems like this that im confused in, but thats a different thread..

#### Attached Files:

• ###### AP PHYSICS Summer Assignment 2011-2012.pdf
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2. Jul 19, 2011

### gdbb

This uses right triangle trig. If you plot the velocity vector of the ostrich on a graph, starting at the origin, can you figure out where it will end? You know the hypotenuse and you're looking for the x- and y-components.

3. Jul 19, 2011

### bling-bling

ohh. now i feel stupid that i didn't think of that before.

4. Jul 19, 2011

### bling-bling

should i round to nearest tenth or hundredth?

5. Jul 20, 2011

### cupid.callin

tenth will be ok

6. Aug 17, 2011

### bling-bling

so would the units be m/s or not since it asks for magnitude??