Let s = s(t) be the position function of a particle moving in a straight line. Suppose that the position of the particle is given by the formula s (t) = t^2 e^-t ; t >= 0 where t is measured in seconds and s in meters. (i) Find the velocity of the particle at time t. * should i differentiate s(t) to get the velocity? (ii) When is the particle at rest? * when velocity = 0.. am i right? (iii) Find the total distance traveled by the particle during the first two seconds. *dont have any idea..