1. The problem statement, all variables and given/known data A lemming accelerates uniformly starting from rest 2 meters before jumping horizontally from the top of a 20 m high cliff. What is the minimum acceleration required so that the lemming can clear the rocks stretching out 4 m from the base of the cliff? 2. Relevant equations I know that we have both an X and Y component we need to calculate, but what is confusing to me is that - how does the 2 meters at the beginning play into the horizontal velocity? And since the lemming is jumping horizontally - what does that mean? Does that mean something other than free fall? Is the initial velocity of the jump the final velocity of the horizontal velocity? 3. The attempt at a solution I have tried this several ways, but have no idea if I'm doing it right. For the X component, I have the initial velocity is 0, the final velocity is unknown, the displacement is 2 m (??) and acceleration is 0 (because can acceleration exist in a horizontal dimension?) and the t is unknown. For the y component, I have the initial velocity as 0, but I don't know if this is correct? The acceleration is -10 m/s2, the Y displacement is -40. So, do I use the pythagorean theorem to find the final velocity of Y? I'm totally confused about where to start. Thanks!!!!!