Question

Two spheres A and B are placed between two vertical walls as shown in figure. Friction is absent everywhere. The ratio of $N_A$ to $N_B$ is

• A. $1$
• B. $2$
• C. $4$
• D. cannot be determined

Answer 1

The correct option is A $1$

As the system is in equilibrium the construct force at $A$ is equal to the sin of contact force between $A$ and $B.$

Same for ball $B.$

The contact force at $B$ is same as the sin of contact force between $A$ and $B$ therefore the ratio is $1:1$

hence,

option $\left(A\right)$ is correct answer.