hf=hi+vi*t-1/2 1.6 t^2
hf=21 vi-.8 (21^2) if hi=0 reference point
I don't see that it can be solved without more info, namely, the height of the cliff.
An astronaut on the Moon throws a stone from the top of a cliff. The stone hits the ground below 21.0 seconds later. The acceleration due to gravity on the moon is
1.6 ms–2. what is the initial vertical velocity?
1 answer