An airplane is flying 25° north of east at a speed of 820 km/h. How fast is it moving to the north?

Question

anonymous · Answer

Imagine the velocity vector for the plane being made up of two other vectors added together, one pointing east and one pointing north, like this|dw:1415997572303:dw|
The question is asking you, what is the component pointing north.

anonymous · Answer

would it be 820sin(25)?

anonymous · Answer

yes, that's right : )

anonymous · Answer

don't forget to include the units

anonymous · Answer

okay so 820sin(25) is like 346.54 but my closets answer choice is 350km/h

anonymous · Answer

well then that's the one to go for

anonymous · Answer

alright. also, when when illustrating the correct way to add two perpendicular vector A & B to get vector C would A and B be opposite from each other?

anonymous · Answer

vectors are added 'tip to tail', as i've indicated in my diagram
basically it shows the east bit being added to the north bit to get the actual velocity

anonymous · Answer

|dw:1415998280000:dw|

anonymous · Answer

awesome! thank you

anonymous · Answer

welcome