posted by jenny .
baloonist drops rock from balloon. takes 7 seconds for the rock to fall. what's the balloonist's altitude in feet?
7th physics -
It will depend upon whether the balloon is rising or falling when the rock is released.
If the balloon altitude is constant at release of the rock,
Y = (g/2)*t^2
is the distance it falls in time t
g = 32.2 ft/s^2 t = 7 s
Solve for the altitude Y