1. The problem statement, all variables and given/known data Ten seconds after starting from rest, a car with a mass of 1000kg is moving at 40m/s. The acceleration of the car is? 2. Relevant equations F=ma or a=vf-vi/t 3. The attempt at a solution I have m=1000kg t=10s d=40m/s I am not sure if d is 40m/s though or is the force? And with one of the formulas I picked I wouldn't be able to use 1000kg? I have a feeling that this problem requires two formulas.