3 Two rocks launched from height h Two rocks of the same mass mare launched horizontally at the same time from a heighth above level ground. Rock A is thrown with twice the speed of rock B, va = 208. Throughout this problem neglect air resistance. UB Ý UA h 1. How much time will it take rock A to impact the ground? 2. What will the velocity oy of rock A be just before it impacts the ground? (Auswer in terms of the the given variables vx, m, h, and/or g. Write the answer as a vector with i and 4.) 3. Which rock - if either - will impact the ground first? 4. Suppose instead that the rocks are launched up at angle & above horizontal still the same mass and TA = 279) Under this condition, which - if either - will impact the ground first? ŪB ө h