Number 7, 8, 9, 10, 11

Applications 7. Which of the following situations most closely describes uniform motion? Explain your answer. a) a person sliding down a waterslide b) water falling down a waterfall c) electricity flowing through a wire 8. A skateboarder travels 50.0 m in 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 m/s. How long is the ball in flight? 10. An airplane flies at a speed of 990 km/h for 4.10 h. How far does the airplane travel? 11. A bird is flying 6.00 km/h in a straight line at a constant rate. How long will it take the bird to travel 30.0 km