With what minimum speed must you toss a 120 g ball straight up to just touch the 15-m-high roof of the gymnasium if you release the ball 1.7 m above the ground? solve this problem using energy. with what speed does the ball hit the ground?
The kinetic energy you put into it will turn into potential energy. Ke=U. When it is falling all of the potential will turn into kinetic. h=15-1.7 for the first and 15 for the second.
