Chrysler

A penny is dropped from rest from the top of the chrysler building in new york city. considering that the height of the building is 320 m and ignoring air resistance, find the speed with which the penny strikes the ground. (answer is in units of m/s)

Vf^2=2ad+vi^2 vf^2= 2(-9.8m/s^2)(-320m) vf^2= 6272m^2/s^2 vf= -79.2m/s since you ask for speed, then 79.2m/s is the answer.