only answering questions 4, 5, 6, 12, 13, 16, 17, 18 please (show work)

Applications 7. Which of the following situations most closely describes uniform motion? Explain your answer. a] a person sliding down a waterslide 1)] water falling down a Waterfall o] electricity owing through a wire 8. A skateboarder travels 50.0 min 12.0 s. What is the average speed of the skateboarder? 9. A baseball player throws a ball a distance of 45.0 m at a speed of 30.0 mfs. How long is the ball in ight? 10. An airplane flies at a speed of 990 kah for 4.1011. How far does the airplane travel? 11. A bird is flying 6.00 krm'h in a straight line at a constant rate. How long will it take the bird to travel 30.0 km? 12. A graph of an object travelling in uniform motion is shown below. Distance-Time Graph 10 E h ID a E a 0 0.0 2.0 Time Its} a} Determine the slope of the graph. b] What quantity does the slope of this graph represent? 13. A graph of an object travelling in uniform motion is shown below. 3] Determine the slope of the graph. b] What quantity does the slope represent? Speed-Time Graph 10 Speed Hmr's] Ln Tlma Us} 14. 15. 16. 17. 18. 19. The ticker tape shown below shows a record ofthe motion efan object on a straight horizontal track. The marks ware produced by a spark timer set at 10 sparks per second. 0.005 0.10 s 0.20 S 0.30 s 0.40 s 0.50 s 0.60 s 0.?0 s a] In your notebook. create a data table that records the time and the distance travelled by the object from the starting point at 0.0 s. b] Draw a distancetime graph of the data in your table. e) Calculate the slope of the line of your graph. d] What information does the slope of this graph give you? Using the same ticker tape shovvn in question 14, answer the following questions. a] In your notebook, create a data table that records the average speed of the object at the end of each time interval. b) Draw a speedtime graph of the data in your table. c) Calculate the area under the line at the 0.70 s mark. d) What information does the area under the line give you? A person walks 15.0 min 5.00 s, and then walks 12.0 min 10.00 s. What is the average speed of the person? A person walks at a speed of 2.00 rule for 10.00 s. and then walks at a speed of 1.50 refs for 8.00 5. What is the average speed of the person? Extensions Sketch a distancetime graph with three lines on it: one that represents a slow-moving object: one for a fast-moving object; and one for an object that is not moving. Why is it so difficult to find examples of objects travelling at uniform motion