Question

find the angle between two forces of equal magnitude when the magnitude of the resultant is also equal to the magnitude of either of these forces​

Answer 1

Answer:

see attachment its clear. btw ur quadrants are wrong, its all positive in 1st

Answer 2

Answer:

angle is 120 degree

Explanation:

Let the Magnitude of each force be F

So,

According to the question,

Fr = Resultant

F= (F^2 + F^2 +2*F*Fcosθ)^0.5

Squaring both sides,

F^2 = F^2 + F^2 +2*F*Fcosθ

F^2 = F^2 (1 + 1 +2cosθ)

1 = 2(1+cosθ)

0.5 = (1+cosθ)

cosθ = -0.5

So, θ = 120