Here's my last string of questions... for the week at least! :) Thank you all so much for your help. If we throw a ball up, is its acceleration just before it reaches its highest point slightly higher than g? This would make sense to me, because if it was at g or lower, it would be ready to fall back down, or would be falling down... If a ball is thrown up and another is thrown down, when they reach the ground, do they both have the same speed? Also, this would make sense to me, because they are both exposed to gravity. A car traveling at 60 km/h accelerates at 2.0 m/s^2. How much time is required for the car to reach a speed of 90 km/h? I calculated 15 seconds for that... It makes sense to me, but we never know... Thanks!