Sum of magnetic of two forces acting on a body is 15 N. The resultant force has magnitude 12 N and it is perpendicular to the large forces, magnetiude of smaller forces is :

Options

A. 2.7 N
B. 3.2 N
C. 1.8 N
D. 4.6 N

Answer

A

Explanation

`" "a + b = 15`
`" "a^(2) + b^(2) + 2ab cos theta = 12^(2) = 144`
`" "cos theta= - ((a)/(b))`