First slide

Pseudo force

Question

A lift is going up, the total mass of the lift and the passengers is 1500 kg. The variation in the speed of lift is shown in fig. Then the tension in the rope at t = 1 s will be

Moderate

A

17400 N
B

14700 N
C

12000 N
D

10000 N

Solution

$\large slope=a=\frac vt=\frac{3.6}{2}=1.8m/s$
$\large T=m(g+a)=1500(9.8+1.8)$
$\large =1500(11.6)=17400N$

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