1. The problem statement, all variables and given/known data An alien form of frog with a mass of 1.5kg (on a planet with an unknown acceleration of gravity) jumps up from his lilly pad at a velocity of 4.0m/s. If the frog reaches a maximum height of 15m, what is the force of gravity on the frog on this planet? It's a stupid question but I am totally stuck on it??