Recent content by Domainx

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.

ok but how can i use any of those when I'm missing 2 variables?

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...