- #1

777lov3r

- 6

- 0

- now i got some variables, v1=0 m/s

time(total)=3.4s

a= -9.80m/s^2

delta d= ?

i got thinking that the total time it takes for the rock to fall then the sound to come back at you would be 3.4 seconds in total, so i don't know how to separate the time it takes the rock to fall from the time it takes the sound to actually get back to you.

by using the 3.4 seconds, i tried to get a distance which was off, at 113 m, but then realized that i need to find out how long it takes for the rock alone to fall, without the sound. i can't find a reasonable way to get this number.

please help!?