Acarpenter working on top of a tall building drops his hammer. in one second it falls one story down from the top. in one more second it will be

The hammer would be 4 storeys down.

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.

v=ir = 3x15 =45 v