SCIENCE 1013.4.1 Practice. Kinematics Practice Physics Sem 1 Points Possible: 40

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Coronado High School, Henderson SCIENCE 1013.4.1 Practice.3.4.1 Practice: Kinematics Practice Physics Sem 1 Points Possible: 40 Question 1 (2 points) A man walks 30 m to the west, then 5 m to ... the east in 45 seconds. a. What is his displacement? (0.5 points) b. What was his total distance walked? (0.5 points) c. What is his average velocity? (0.5 points) d. What is his average speed? (0.5 points) Question 2 (4 points) A soccer player runs across a soccer field. a. If the soccer player runs with a speed of 4.6 m/s, how long does it take him to run 60 m? (1 point) b. It takes the soccer player 3 seconds to reduce his speed to 3.1 m/s. What is his acceleration? (1 point) c. The soccer player is running at a speed of 4 m/s when he slides on the ground, coming to a stop in a distance of 2 m. What was his acceleration? (1 point) d. The soccer player accelerates from rest at a rate of 3.1 m/s2. How far does he run in 1.5 seconds? (1 point) Question 3 (3 points) A gargoyle statue falls off the side of a building from a height of 75 m. (Assume no air resistance.) a. How fast is the statue moving after 1.75 seconds? (1 point) b. How long does it take the statue to reach the ground? (1 point) c. How fast is the statue moving when it reaches the ground? (1 point) Question 4 (3 points) The graph below shows the speed of a car as it drives along a racetrack. a. When does the car have the highest velocity? (1 point) b. When does the car have approximately zero acceleration? (1 point) c. How would you find the displacement of the car from this graph? (1 point) You can find displacement by measuring the area under the curve of the velocity versus time graph. Question 5 (6 points) You launch a water balloon from the ground with a speed of 8.3 m/s at an angle of 27°. a. What is the horizontal component of the velocity? (1 point) b. What is the vertical component of the velocity? (1 point) c. How long does it take the water balloon to reach its highest point? (1 point) d. What is the maximum height of the water balloon? (1 point) e. What is the total amount of time that the water balloon is in the air? (1 point) f. How far does the water balloon land from where you launched it? (1 point) Question 6 (3 points) A car drives on a circular track with a constant speed of 84 m/s. The track has a radius of 225 m. a. What is the centripetal acceleration of the car? (1 point) b. What is the acceleration of the car measured in g? (1 point) c. What speed would give the car an acceleration of 9.8 m/s2? (1 point) Question 7 (1 point) You walk with a velocity of 2 m/s north. You see a man approaching you, and from your frame of reference he has a speed of 3 m/s to the south. What is the velocity of the man from the frame of reference of a stationary observer? (1 point) Read page 1 of the practice activity to find information that will help you answer questions 8 – Question 8 (4 points) Duane and Albert have a race. Duane starts 5 m ahead of Albert and runs forward at a speed of 3 m/s. Albert runs forward at a speed of 4.2 m/s. a. Write an expression for Duane's position in terms of t and vduane. (Hint: Set x = 0 at Albert's starting point.) (1 point) b. Write an expression for Albert's position in terms of t and valbert. (1 point) c. At what time does Albert catch up to Duane? (Hint: Set the two expressions for position equal to each other and solve for time.) (1 point) d. How far from Albert's starting point are they when they meet? (1 point) Question 9 (4 points) Derek and Diane race each other on bicycles. Derek starts 4 seconds before Diane. He goes at a steady speed of 6 m/s. Diane starts from rest and has an acceleration of 2 m/s2. a. Write an expression for Derek's position in terms of t and vderek. (1 point) b. Write an expression for Diane's position in terms of t and adiane. (1 point) c. At what time does Diane catch up to Derek? (1 point) d. How far has she gone when she catches up with him? (1 point) Question 10 (4 points) Greg and Tabitha are jogging together. At time t = 0, they are both traveling at a speed of 4 m/s, but Greg is 8 m ahead of Tabitha. Tabitha accelerates at a rate of 1.5 m/s2 and Greg accelerates at a rate of 1.0 m/s2. a. Write an expression for Greg's position. Plug in all the values you can to simplify the expression. (1 point) b. Write an expression for Tabitha's position. Plug in all the values you can to simplify the expression. (1 point) c. How long does it take Tabitha to catch up to Greg? (1 point) d. How far has Tabitha run while catching up to Greg? (1 point) Question 11 (2 points) Bill throws a tennis ball to his dog. He throws the ball at a speed of 15 m/s at an angle of 30° to the horizontal. Assume he throws the ball from ground level. a. If Bill and his dog start in the same place, how fast should his dog run to intercept the ball exactly as it lands on the ground? (1 point) b. How fast should the dog run to get to where the ball will be at a height of 2 m as it falls back toward the ground, and to get there 0.5 seconds before the ball gets there? (Hint: In this problem, you will need to consider both the x- and y-coordinates of the ball's position.) (1 point) Question 12 (4 points) A baseball player hits a ball at a speed of 34 m/s at an angle of 30°. When the ball hits the bat, it is 1.2 m above the ground. An outfielder positions himself 98 m from where the ball was struck, and the ball flies over his head. a. At what time does the ball pass over the outfielder's head? (1 point) b. Standing straight up, the outfielder can raise his glove to a height of 2.3 m. How high does the ball fly over the outfielder's glove? (1 point) c. He can jump upward at a speed of 7 m/s. At what time after the ball is hit should he jump so that his glove intersects the path of the ball? (1 point) d. Why are there two possible solutions for part (c)? (1 point) [Show More]

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