Laws of Motion - Result Question 26

26. A person of mass 60kg is inside a lift of mass 940kg and presses the button on control panel. The lift starts moving upwards with an acceleration 1.0m/s2. If g=10ms−2, the tension in the supporting cable is

(a) 8600N

(b) 9680N

(c) 11000N

(d) 1200N

[2011]

Show Answer

Answer:

Correct Answer: 26. (c)

Solution:

  1. (c)

Total mass =(m+m)=(60+940)kg=1000kg

Let T be the tension in the supporting cable, then

T−1000g=1000×1[∵a=1m/sec]⇒T=11000N

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