The hammer would be <u>4 storeys down.</u>
The distance traveled by a freely falling body is given by the expression,
here, g is the acceleration due to gravity and t is the time taken.
The distance the hammer falls in 1 second is given by,
This is equal to the height of 1 storey.
If 1 more second elapses, the hammer is in air for 2 s.
The distance it falls in 2 seconds is given by,
Since the height of 1 storey is given by,
Therefore,
The hammer would be 4 storeys down. It travels 1 storey in the 1st second and 3 storeys in the 2nd second.