Question

The elevator shown in figure is descending with an acceleration of $2m/s^2$. The mass of the block $A=0.5kg$. The force exerted by the block $A$ on block $B$ is :

• A. $2N$
• B. $4N$
• C. $6N$
• D. $8N$

Answer 1

Answer: (B)

$4N$

There is a psuedo force upwards of value $0.5kg\times 2m/s^2=1N$
Let normal force be N, taking conditions for equilibrium,

$⟹N+1=5$
$\therefore$ $N=4N$