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A lift with a mass 1200 kg is raised fro...

A lift with a mass 1200 kg is raised from rest by a cable with a tension 1350kgf. After some time the tension drops to 1000kgf and the lift comes to rest a height of 25 m above its initial point . ( 1 kgf=9.8 N).
What is the height at which the tension changes ?

A

10.8 m

B

12.5 m

C

14.3 m

D

16 m

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • A lift with a mass 1200 kg is raised from rest by a cable with a tension 1350 g N. After some time the tension drops to 1000 g N and the lift comes to rest a height of 25 m above its initial point . ( 1 g N=9.8 N). What is the greatest speed of the lift ?

    A
    `9.8 "m.s"^(-1)`
    B
    `7.5 "m.s"^(-1)`
    C
    `5.92 "m.s"^(-1)`
    D
    none of these

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