i don't know how to do this. i just need help. i know the answer already, i just want to see how to do it. could you show me? if you get the answer to be like 95ish, then it's right.
i have no idea how to make equations, I'm not that advanced in physics i think!
i guess, you could say that '340 m/s * time' + 'vi*t + .5*a*t^2' is the total distance, but..idk. i just need a jumpstart.
well, how do i know how long it takes?? i just need someone to start this. i have the initial velocity (0), the acceleration (9.81 m/s/s)..
and equations vf=vi + at (but I'm missing vf and t)
vf^2 = vi^2 + 2ad (missing d and vf)
d=vi*t + .5*a*t^2 (missing d and t)
so how do i figure it out??
Homework Statement
A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 4.7 s later. If the speed of sound is 340 m/s, how high is the cliff?Homework Equations
d=vit+.5at^2
vf^2=vi^2 +2ad
vf=vi+at
The Attempt at a Solution
so, i don't know how to have both the...