Question

l The magnitude of two forces are in the ratio 3 : 2. If the first force is doubled, the magnitude of the resultant of the two forces, is also doubled. Find the angle between the two forces​

Answer 1

Answer:

if the first force is doubled then resultant is also doubled. The angle between the two forces is. Solving these two equations we get, cosθ=-12orθ=120∘.