Question

So i am having a hard time figuring out which equation to use to help me solve this problem.....

A ball is thrown horizontally from a platform so that the initial height of the ball is 6.0 m above the level ground below. The ball lands 24 m from its original horizontal location. Find how fast the ball was thrown.

Answer 1

alright so how long does it take the ball to fall 6m?

Answer 2

6=(.5)a*t
find t
a=acceleration due to gravity in this case

Answer 3

where did you get the .5 from?

Answer 4

\[v _{f}=v _{i }+a \Delta t\]
follows after cherio's setup

Answer 5

.5 comes from \[x _{f}=x _{i}+v _{i}\Delta t + (.5)a \Delta t^{2}\]

Answer 6

you can use the time from that equation and then plug it into the equation I wrote above to calculate the initial velocity.

Answer 7

im still confused

Answer 8

solve for t from cherio's equation. plug that value into the the equation i posted. solve for v
_i