Question

If an object is dropped from a height of 200 feet, the function h(t) = -16t^2 + 200 gives the height of the object after t seconds. Approximately, when will the object hit the ground?

Answer 1

Answer: The answer should be C. 3.54 seconds

Answer 2

200 feet = 200 * 0.3048 = 60.96 m
e = 0.5 * g * t ^2
e = 60.96
g = 9.8 m/s2
t = ?
t^2= 60.96 / 0.5 * 9.81 = 12.440
t = 3.5271 s