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

Question

A lift is going up. The total mass of the lift and the passenger is 1500 kg . The variation in the speed of the lift is as given in the graph. The tension in the rope pulling the lift at t = 11th sec will be <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/6aa5dbf4deb768e06c7ffb276abb1d75-.png" /> (A) 17400 N (B) 14700 N (C) 12000 N (D) Zero

Tardigrade Admin · Accepted Answer

At 11 th second lift is moving upward with acceleration a=(0-3.6/2) =-1.8 m/s2 Tension in rope, T=m(g-a) 1500(9.8-1.8) = 12000 N

Q. A lift is going up. The total mass of the lift and the passenger is $1500 k g$ . The variation in the speed of the lift is as given in the graph. The tension in the rope pulling the lift at $t = 11 t h$ sec will be

$17400 N$

$14700 N$

$12000 N$

Zero

At $11$ th second lift is moving upward with acceleration

$a = \frac{0 - 3.6}{2}$

$= - 1.8 m / s^{2}$

Tension in rope, $T = m (g - a)$

$1500 (9.8 - 1.8) = 12000 N$

Q. A lift is going up. The total mass of the lift and the passenger is 1500kg . The variation in the speed of the lift is as given in the graph. The tension in the rope pulling the lift at t=11th sec will be

17400N

14700N

12000N