An object is dropped from the top of building that is 200 feet about ground level. When object will reach ground ?
Use acceleration due to gravity: g = -32ft/sec^2, initial velocity of 0, and initial height of 200 in the equation:
`h(t) = -1/2 g t^2+v_0t+h_0`
So we have
Solve for t when h(t) = 0:
`-200 = -16t^2`
`200/16 = 100/8 = 50/4 = 25/2 = t^2`
t = 3.5 seconds.