A construction worker drops a hammer from a height of 25m. How long will it take the hammer to hit the ground? Use the formula h(t)= -4.9t^2+vt +h, where v is the initial velocity and h is the height

Answer 1

h = -4.9t^2 + 25 = 0

t^2 = 25/4.9

t = sqr(25/4.9) = about 2.26

= about 2 1/4 seconds

to reach the ground