EXERCISE Suppose a particle moves along the x-axis. Its x-coordinate varies with time according to the expression x = 34.0 + 4.0t + 1.2t, where x is in meters and t is in seconds. Hint (a) Determine the displacement Ax of the particle (in m) in the time interval t = 9 s to t = 20 s. Ax= m (b) Calculate the average velocity (in m/s) in the time interval t = 9 s to t = 20 s. v = m/s (c) Find the instantaneous velocity of the particle (in m/s) at t = 18.4 s. m/s

EXERCISE Suppose a particle moves along the x-axis. Its x-coordinate varies with time according to the expression x = 34.0 + 4.0t + 1.2t, where x is in meters and t is in seconds. Hint (a) Determine the displacement Ax of the particle (in m) in the time interval t = 9 s to t = 20 s. Ax= m (b) Calculate the average velocity (in m/s) in the time interval t = 9 s to t = 20 s. v = m/s (c) Find the instantaneous velocity of the particle (in m/s) at t = 18.4 s. m/s