The end A of a ladder AP of length 5m, k...

The end A of a ladder AP of length 5m, kept inclined to a vertical wall is slipping over a horizontal surface with velocity of `2m//s`, when A is at a distance of 3m from the wall. Velocity of C.M. at this moment is

`1.25 m//s`

`0 m//s`

`1 m//s`

`2 m//s`

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