SOLUTION: How do I solve the following formula with the provided information. It appears there may be a missing factor... 4.9t^2+vot=s. An object falls from 2,547 meters. How many seconds d

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: How do I solve the following formula with the provided information. It appears there may be a missing factor... 4.9t^2+vot=s. An object falls from 2,547 meters. How many seconds d      Log On


   

Question 1114666: How do I solve the following formula with the provided information. It appears there may be a missing factor...
4.9t^2+vot=s. An object falls from 2,547 meters. How many seconds does it take for it to hit the ground? Don't I need to know what the initial velocity is in order to accurately determine this answer???
Found 2 solutions by stanbon, ikleyn:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How do I solve the following formula with the provided information. It appears there may be a missing factor...
4.9t^2+vot=s. An object falls from 2,547 meters. How many seconds does it take for it to hit the ground? Don't I need to know what the initial velocity is in order to accurately determine this answer???
----
Formula:: height = 4.9t^2 + vo*t
-----
If you simply drop the object the initial velocity is zero.
4.9t^2 = 2547
t = sqrt(518.8) seconds = 22.8 seconds
------------------
Cheers,
Stan H.
------------

Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.
The problem does not say it directly, but from the context, the initial speed v%5B0%5D is zero.


Since the problem does not specify it directly and explicitly, you may/should/must assume that the initial velocity is zero.