The motion of an object toward the north is plotted on the velocity-time graph shown at right. 1) a) Briey describe, in general terms, the motion of the object. . b) Briey describe the instantaneous acceleration of the object as it moves, and explain how it can be determined from this graph. Be specic. c) Briey explain how the total displacement of the object can be determined from this graph. Be specic. A car changes velocity from an initial value of 12.0 m/s to the right to a nal value of 5.00 m/s to the left. The change in velocity takes 6.00 s to complete. 2) What is the displacement of the car during this time? A boy standing at the edge of a cliff throws a rock straight up into the air at time t = 0. The rock has an initial speed of 10.0 m/s. 3) At what time t is the rock a vertical distance of 45.0 m below its starting point