Question

A mt is going up. the total mass of the lift and the passenger is 1500 kg. The variation in the speed of the is as given in the graph. The tension in the rope pilling the lift at $t={11}^{th}$ sec will be

• A. 17400 N
• B. 14700 N
• C. 12000 N
• D. Zero

Answer 1

The correct option is C 12000 N

$\begin{array}{c}At11th\sec ondliftismovingupwardwithacceleration,\\ a=\frac{0-3.6}{2}=-1.8m/s^2\\ Tensioninrope,T=m\left(g-a\right)\\ =1500\left(9.8-1.8\right)=12000N\end{array}$

Hence,

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