Problem 2 - Velocity and Acceleration A point particle moves along the r axis, and its position as a function time is given by the equation r(t) = At - B+3 , where A and B are positive constants. a) Which combinations of SI units are used to measure A and B, respectively? (5 points) b) What is the equation describing the velocity of the particle as a function of time? (5 points) c) At what time is the velocity zero? Write your answer in terms of A and B. (5 points) d) What is the maximum value which a can have? Write your answer in terms of A and B. (5 points) e) What is the equation describing the acceleration of the particle as a function of time? (5 points)