So I just got beat up by this question on my midterm. I'm not sure if these problems are always called definition of success but that is how my professor refers to them as. The question: (paraphrased) When you walk into your dorm room you like to throw your keys onto the center of your desk. The center of your desk is 8 meters from you and is 1 meter high. You're nearly 2 meters tall thus your throw well start at 2 meters. You throw it at an angle of 30 degrees. Because of all your practice it lands dead center on your desk. What is the initial Velocity, Vo, of your throw, and at what time, t, does it land? My attempts and thoughts: I was at a total loss for this problem, I tried reworking the three constant acceleration equations and got no where. Upon leaving the lecture hall, it dawned on me that the range equation may help but I'm not 100% on that either. Thanks for your help I just want to know how to approach this type of problem in the future.