1. The problem statement, all variables and given/known data A particle has initial velocity and constant acceleration. If its velocity after certain time is v then what will its displacement be in twice of that time? 2. Relevant equations 3. The attempt at a solution Im thinking about using one of the classic kinematics equations, however i dont have the value of the initial velocity. So im stuck in this problem. If someone could explain to me how i find this velocity, i would be grateful.