Laws Of Motion Question 304

Question: A person of mass 60 kg is inside a lift of mass 940 kg and presses the button on control panel. The lift starts moving upwards with an acceleration$ 1.0m/s^{2} $ . If $ g=10m{{s}^{-2}} $ , the tension in the supporting cable is

Options:

A) 8600 N

B) 9680 N

C) 11000 N

D) 1200 N

Show Answer

Answer:

Correct Answer: C

Solution:

[c] Total mass $ =(60+940)kg=1000kg $

Let T be the tension in the supporting cable,

Then $ T-1000g=1000\times 1 $

$ \Rightarrow T=1000\times 11=11000\text{ N} $



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