Two students live on the 2nd and 5th floor. The student on the 5th floor throws a eraser out the window to the out studenton the 2nd ,whose window is 5.6m above the ground, notices that it takes 1.4s for it to pass her window. What is the height from the 5th floor to the ground:confused::confused:

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Thanks!

using s = ut + 1/2at^2

s = 0*1.4 + 1/2*9.81*1.4^2

= 0 + 9.6138

= 9.6138m -------- height from 2nd floor to 5th floor


Height of 5th floor from ground = 5.6 + 9.6138

= 15.2138m