I've been reviewing physics for the science subtest I. The study guide says you need to perform simple calculations in regards to motion, velocity, and acceleration, both for straight line motion and circular motion. My question is, what equations do I know to know to solve these problems. There are a lot of different ones to explain motion. From the simple velocity=change in positon/change in time to more complicated ones like: x(distance)=v(initial)t + 0.5at(squared) with circular velocity there is v=2pier/t and then more complicated equations including the angular velocity and tangential velocity and acceleration. Does someone know the equations that are important to memorize? All these equations are driving me crazy!!!