Question

If two forces are acting at a point such that the magnitude of each force is 2N and the magnitude of their resultant is also 2N, then the angle between the two forces is

Answer 1

Answer:

Let the two vectors be A and B, and their resultant be R.

Let the angle between A and B be θ

A=2N

B=3N

R=4N

Now R

2

=A

2

+B

2

+2ABcosθ

So,4

2

=2

2

+3

2

+2×3×4cosθ

So, 16=4+9+24cosθ

So, 16=13+24cosθ

So, 3=24cosθ

So,

24

3

=cosθ

So, cosθ=1/8

So, θ=cos

−

1(1/8)

Answer 2

Answer:

Explanation:

For this we have to use the graphical method and according to that the answer is 120°

Hope it helps.