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Calculus Question help...?
So this is for my assignment, I've done all of it, except this one question that I'm absolutely stumped on.
A stone is dropped from the upper observation deck of a tower, 50 m above the ground. (Assume g = 9.8 m/s^2.)
(a) Find the distance (in meters) of the stone above ground level at time t.
Answer: -4.9t^2 +50
(b) and (c) dont matter and I have done those as well, I'm just confused about part (d)
(d) If the stone is thrown downward with a speed of 8 m/s, how long does it take to reach the ground? (Round your answer to two decimal places.)
1 Answer
- ted sLv 78 years agoFavorite Answer
but it follows from (a) if you worked that one and did not use a formula
d²h / dt² = - 9.8 ---> d h / dt = - 9.8 t + C , where C = - 8--->
h = - 4.9 t² - 8 t + K , where K = 50...find t if h = 0