forces of 80 Newton and 70 Newton at simultaneously at a point .find the resultant force ,if the angel between them is 150°.
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R = √ A^2 + B^2 + 2AB cos theta
R = √6400 + 4900 + 11200 cos 150°
R = √22500×(-√3/2)
R = √11250 × (-√3)
R = √ -19462
R = 139.5i
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