An elevator of height `'h'` ascends with constant acceleration `'a'`. When it corsses a plalform bolt drops from the top of the elevator. If the time for the bolt to hit the floor of the elevator is `sqrt((lambdah)/(g + a))` then find `'lambda'`.

Answer

`2`

Explanation

Choose the floor of the elevtore as reference. The observer is inside the elevator take the downward directon as positive.
Acceleration of blot relative to elevatore is
`a' = g -(-a) = g + a`
`h = (1)/(2)a't^(2) = (1)/(2)(g + a)t^(2)`
`t = sqrt((2h)/(g + a))`