Name Period Worksheet # 2 Kinematic Practice {Motion in horizontal direction} . With a time of 6.92 s. Amalia Kozma holds the women's record for ninning 60 m, Suppose she ran this distance with a constant acceleration, so that she crossed the nish line with a speed of 1134 mils. Assuming she started at rest. what was the magnitude of Kozma's average acceleration? . Despite their size and awkward appearance, polar bears can run at respectable speeds for short distances. Suppose a polar bear running with an initial speed of 4.0- mi's accelerates uniformly for 18 5. What is the bear's maximum speed if the bear travels 135 m during the 18 5 of acceleration? Give the answer in both meters per second and kilometers per hour. . The shark can accelerate to a speed of 32.0 kmlh in a few seconds. Assume that it takes a shark 1.5 s to accelerate uniformly from 2.8 kmiFh to 32 kmfh. What is the magnitude of the shark's acceleration? _ One of the most consistent longjumpers isjackiejoynerKersee of the United States. Her best distance in this eld and track event is 3.49 rn. To achieve this distance, her speed at the point where she started the jump was at least 8.5? mils. Suppose the runway for the long jump was 19.53 m, and that Joyner Kersee's initial speed was 0 mfs. What was the magnitude of her acceleration if it was uniform acceleration? . A ship with an initial speed of 6.23 mi's approaches a dock that is 255 m away. If the ship accelerates uniformly and comes to rest in 82 5. what is its acceleration? 6. A thoroughbred racehorse accelerates uniformly at 7.56 m/s', reaching its final speed after running 19.0 m. If the horse starts at rest, what is its final speed? 7. A car enters the freeway with a speed of 6.4 m/s and accelerates uniformly for 3.2 km in 3.5 min. How fast (in m/s) is the car moving after this time? 8. A car accelerates uniformly in a straight line from rest at the rate of 2.3 m/s?. a) What is the speed of the car after it has traveled 55 m? b) How long does it take the car to travel 55 m? 9. The graph below shows the position of a bug and different times during his search for food. Use the graph to determine the bug's displacement and average velocity (m/s). a) For the time interval from t = 0.0 min to t = 10.0 min b) For the time interval from t = 20.0 min to t = 40.0 min c) For the entire distance 6.0 5.0 Distance (m) 4.0 3.0 2.0 1.0 0.0 0.0 10.0 20.0 30.0 Ann Time (min)