HW 1: Problem #4 Analysis Due Apr 12 by 11:59pm Points 8 Available Apr 3 at 7am - Jun 12 at 8am t3 v = u 15 The graph represents the motion of an object in a straight line. The speed of the object at t is zero. Let's define positive velocity to mean the object is moving to the right, and negative velocity when the object is moving to the left. All three lines have identical magnitudes of slopes. The speed u is 9.5 m. The marked times are: t1 = 4s, t2 = 5s, t3 = 10s, t4 = 13s and t5 - S : 15s. Determine the velocity at t = 0. Indicate the direction by including the proper sign. [leave at least one decimal place]