three forces with magnitudes of 80lbs,70lbs,130lbs act on an object at angles of 15degrees,37degress,and205 degrees respectively, with the positive x- axis. find the magnitude and direction of the resultant force. please help final tommorrow....

Question

anonymous · Answer

Get the x components of force from Fx = F cos @, where F is force and @ is angle
Get the y components of force from Fy = F sin @, where F is force and @ is angle

add the components to get vector F = (sum Fx, sum Fy)

magnitude of vector (a,b) is sqrt(a^2+b^2)
direction is arc tan (b/a)