With regards to a shot of lava at a point 1900 ft shooting straight into the air,
what was the lava's exit velocity in feet per second? in miles per hour?
Hint: If is the exit velocity of a particle of lava,
its height seconds later will be: . feet.
Begin by finding the time at which
I assume is just another term for the first velocity. . . . . Yes!
. . . You were well on your way . . .
You found that the lava reached maximum height at: . seconds.
Then the maximum height is: . feet
But we are told that the maximum height is 1900 feet.
. . So we have: .