Answer:
To find the angle between the forces of 3N and 7N when they are in equilibrium we can use the concept of vector addition.
In equilibrium the sum of the forces acting on the particle should add up to zero. So we can write the following equation:
3N + 7N = 0
Simplifying the equation we get:
10N = 0
This equation is not possible as a non-zero force cannot add up to zero in equilibrium. Therefore the forces of 3N and 7N cannot be in equilibrium.
Hence the angle between these forces cannot be determined in the given scenario.