# Speed of block at the end of one second after the start w.r.t.ground is(g=10m/s^2.(We have to find this)

We have,
Acceleration of the elevator = 15 $m/s^2$ ( greater than $g$ )

Therefore, the body gets separated from the elevator. Thus body moves with the acceleration of 10 $m/s^2$
Initially block is at rest
therefore,  u = 0
t = 0.2 sec
So, the speed of the block =  v = u + at
$=0 + 10 \times 0.2 = 2m/s^2$

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