A) A ball falling down and bouncing back up B) A rock thrown up and falling down 0) A car climbing a hill and falling off a cliff D) A mass oscillating on the end of a spring 3. A graph of acceleration versus time is shown. The change in velocity from t = O s to t = 5 sis closest to A) 30 ms 20111332) 3) -3D mfs s C) 40 ms 4 D) -40 mfs 5 10 H8) 4. We use plus and minus signs to indicate the directions of velocity and acceleration for an object moving along a straight line. Which of the following combinations results in a decrease in the speed of the object? A) positive velocity and negative acceleration 3) negative velocity and positive acceleration C) negative velocity and negative acceleration D) answers A and B 5. A sprinter starts from rest and runs a distance of 100 m in 11 seconds with a constant acceleration. What distance does she oover during the last second? A) 17.4 m B) 21.4 m C) 25.4 m o} 30.4 m 6. An arrow is aimed at a target point P - a horizontal distance X away from the point of release A. The strikes the wall a distance h below the target point, as shown. If the distance X were twice as big, and the arrow had the same initial velocity, how would h be affected? Ignore air resistance. The drop h, will be as large . | "N A) one quarter B) half C) twice on) four times (1- X