Question

An elevator accelerates upward at a constant rate. A uniform string of length $L$ and mass $M$ supports a small block of mass $M$ that hangs from the ceiling of the elevator. The tension at distance $l$ from the ceiling is $T$. The acceleration of the elevator is

• A. $\frac{T}{M+m-\frac{ml}{L}}-g$
• B. $\frac{T}{2M+m-\frac{ml}{L}}+g$
• C. $\frac{T}{M+\frac{ml}{L}}-g$
• D. $\frac{T}{2M-m+\frac{ml}{L}}-g$

Answer 1

The correct option is A $\frac{T}{M+m-\frac{ml}{L}}-g$

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