Question

if a boy dropped a book and pencil from a 3rd storey building.if the objects were dropped 9 m from the ground, how long would it take to hit the ground? if the acceleration due to gravity is 10ms-2, what would the velocity be when the book hits the ground?

Answer 1

the time is 0.9 s^

Answer 2

i think that is rgt.... 0.9sec

Answer 3

v=d/t

Answer 4

final velocity is 0

Answer 5

0.9 sec

Answer 6

Actually guys thanks for helping much apprecitaed but your answer is wrong, I posted this question to some where else which was also very helpful but the answer is 1.34s and there also the question what is the velocity which 13.4ms-1.Never mind thanks for helping. :)

Answer 7

\[9-5t^2=0\]
\[t=\frac{3}{\sqrt5}\approx1.34\]
so yeah