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 one year ago
Vector Construction help! I've been stuck on this for some time, not sure what to do! Construct c = a + b by drawing and calculating the direction and magnitude of c. The direction should be measured from the +axis. // See illustration below.
 one year ago
Vector Construction help! I've been stuck on this for some time, not sure what to do! Construct c = a + b by drawing and calculating the direction and magnitude of c. The direction should be measured from the +axis. // See illustration below.

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dav21
 one year ago
Best ResponseYou've already chosen the best response.1to add 2 vectors you need to connect them tip to end

Study23
 one year ago
Best ResponseYou've already chosen the best response.0Okay, I got that part but was confused where to go from there

Study23
 one year ago
Best ResponseYou've already chosen the best response.0Where do I go from there????

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1drawing part of the question is over, next calculate mag and direction of a+b

Study23
 one year ago
Best ResponseYou've already chosen the best response.0That's the part where I'm stuck!

Study23
 one year ago
Best ResponseYou've already chosen the best response.0The mag would be found using pythagorean theorem right?

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1to add vectors, u need to break them into components

dav21
 one year ago
Best ResponseYou've already chosen the best response.1break vector into x component and y components then add x components and add y components

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1dw:1381003391274:dw

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1dw:1381003459892:dw

Study23
 one year ago
Best ResponseYou've already chosen the best response.0Oh okay! So from there, I would use the pythagorean theorem, and for the direction, I would...?

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1first find the components of a+b

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1x component of a+b = 4.5cos(60)  8cos(45) y component of a+b = 4.5sin(60) + 8sin(45)

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1y components are in same direction, so u add them x components are in opposite directions, so u subtract them

Study23
 one year ago
Best ResponseYou've already chosen the best response.0How do I know what to subtract from what?

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1dw:1381003731661:dw

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1dw:1381003758234:dw

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1we follow that, if ur components are in that direction, they're +ve if they're in opposite, they're ve

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1x component of a+b = 4.5cos(60)  8cos(45) y component of a+b = 4.5sin(60) + 8sin(45)

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1once you have the x and y components for c, to get direction just use the samne formula, \(\theta = \large \tan^{1} \frac{y}{x}\)

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1mag also same formula : \(\large \sqrt{x^2+y^2}\)

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1a+b is just a vector, so u can use same formulas

Study23
 one year ago
Best ResponseYou've already chosen the best response.0That makes as a lot more sense, thank you so much!

Study23
 one year ago
Best ResponseYou've already chosen the best response.0@ganeshie8 I get 25 degrees for angle?

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1dw:1381004400621:dw

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1check ur calculation again :)

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1wolfram says below : http://www.wolframalpha.com/input/?i=arctan%28%284.5sin%2860%29+%2B+8sin%2845%29%29%2F+%284.5cos%2860%29++8cos%2845%29%29%29 add 180 to it, to get into 2nd quadrant maybe

Study23
 one year ago
Best ResponseYou've already chosen the best response.0@ganeshie8 What about if the vectors are being substracted then what do you do with the components for a and b? Is it the same like: we follow that, if ur components are in that direction, they're +ve if they're in opposite, they're ve

Study23
 one year ago
Best ResponseYou've already chosen the best response.0The magnitudes is what I'm having trouble with. When I use the formula, I get a decimal answer?

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1for mag just take sqrt(x^2+y^2)
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