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anonymous
 2 years 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.
anonymous
 2 years 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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anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1381002960366:dw

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0to add 2 vectors you need to connect them tip to end

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

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1381003142681:dw

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0Where do I go from there????

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

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0That's the part where I'm stuck!

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0The mag would be found using pythagorean theorem right?

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

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0add the components bro

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0break vector into x component and y components then add x components and add y components

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

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

anonymous
 2 years 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...?

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0why pythagorean theorem

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

ganeshie8
 2 years 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
 2 years 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

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0How do I know what to subtract from what?

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

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

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

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

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

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0@ganeshie8 I get 25 degrees for angle?

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

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

ganeshie8
 2 years 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

anonymous
 2 years 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

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