2. Solved Papers
  3. AFMC

AFMC AFMC Solved Paper-2010

  • question_answer
    A spring balance is attached to the ceiling of lift. A man hangs his bag on the string and the balance reads 49 N, when the lift is stationary. If the lift moves downwards with an acceleration of 5 ms-2. The reading of the spring balance would be

    A) 24 N                                      

    B) 74 N

    C) 15 N                                      

    D) 49 N

    Correct Answer: A

    Solution :

     When the lift is stationary \[R=mg\] \[49=m\times 9.8\] \[m=\frac{49}{9.8}kg=5\,kg\] If a is downward acceleration of lift. then,       \[R=m(g-a)\]             \[R=5(9.8-5)=24\text{ }N\]


You need to login to perform this action.
You will be redirected in 3 sec spinner