Homework Help: physics

Posted by nehA on Thursday, November 24, 2011 at 1:46pm.

the magnitude of 2 vectors are 4 and 5 units and the angle b/w them is 30,taking first vectoron x-axis.find the magnitudeof resultant vectorand its direction?

vector addition - drwls, Thursday, November 24, 2011 at 2:02pm
The x component of the resultant is
Rx = 4 + 5 cos30 = 8.330
The y component of the resuoltant is
0 + 5 sin30 = 2.500
The resultant magnitude is
sqrt[(8.33)^2 + (2.5)^2] = ___
The angle from the x axis is tan^-1(2.55/8.33)= ___

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