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A lift a mass 1200 kg is raised from res...

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

A

`9.8 ms^(-1)`

B

`7.5 ms^(-1)`

C

`5.92 ms^(-1)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
`nu = sqrt(2 a_(1) h_(1)) = sqrt(2 xx 1.225 xx 14.3)`
`= 5.92 m//s`
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