3. Approximately how far will an object near Earth's surface fall in 3.0 seconds? m m m m
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1 Page 1 of 5 Sub work Name 12-OCT A car travels a distance of 98 meters in 10. seconds. What is the average speed of the car during this 10.-second interval? m/s m/s/ m/s m/s 2. A boat initially traveling at 10. meters per second accelerates uniformly at the rate of 5.0 meters per second 2 for 10. seconds. How far does the boat travel during this time? m m m m 3. Approximately how far will an object near Earth's surface fall in 3.0 seconds? m m m m 4. What is the displacement of the mass hanger (H) shown in the diagram after a 0.20-kilogram mass is loaded on it? [Assume the hanger is at rest in both positions.] cm cm cm cm 5. The accompanying graph represents the motion of an object. According to the graph, as time increases, the velocity of the object 1. decreases 3. remains the same 2. increases 6. Which terms both represent scalar quantities? 1. displacement and velocity 3. displacement and speed 2. distance and speed 4. distance and velocity 7. Which graph best represents the motion of an object whose speed is increasing?
2 Page 2 of 5 8. Two cars, A and B, are 400. meters apart. Car A travels due east at 30. meters per second on a collision course with car B, which travels due west at 20. meters per second. How much time elapses before the two cars collide? s s s s 9. A softball player leaves the batter's box, overruns first base by 3.0 meters, and then returns to first base. Compared to the total distance traveled by the player, the magnitude of the player's total displacement from the batter's box is (note that this question has only three choices) 1. smaller 3. the same 2. larger 10. The speed of a car is decreased uniformly from 30. meters per second to 10. meters per second in 4.0 seconds. The magnitude of the car's acceleration is m/s m/s m/s m/s Objects A and B are dropped from rest near Earth's surface. Object A has mass m and object B has mass 2m. After 2 seconds of free fall, object A has a speed v and has fallen a distance d. What are the speed and distance of fall of object B after 2 seconds of free fall? 1. speed = v/2; distance = d/2 3. speed = v/2; distance = 2d 2. speed = v; distance = d 4. speed = 2v; distance = 2d 12. In the accompanying diagram, the upward drag force acting on a parachute is equal in magnitude but opposite in direction to the weight of the parachutist and equipment. As a result of the forces shown, the parachutist may be moving
3 Page 3 of 5 1. downward with decreasing speed 3. upward with decreasing speed 2. downward at constant speed 4. upward with constant acceleration 13. The accompanying diagram shows a 2.0-kilogram block being moved across a frictionless horizontal surface by a 6.0-newton horizontal force. What is the magnitude of the acceleration of the block? m/s m/s m/s m/s The magnitude of the acceleration due to gravity on the surface of planet A is twice as great as on the surface of planet B. What is the ratio of the weight of mass X on the surface of planet A to its weight on the surface of planet B? 1. 1:2 3. 1:4 2. 2:1 4. 4:1 15. What is the total displacement of a student who walks 3 blocks east, 2 blocks north, 1 block west, and then 2 blocks south? blocks west 2. 2 blocks east 4. 8 blocks 16. A group of bike riders took a 4.0-hour trip. During the first 3.0 hours, they traveled a total of 50. kilometers, but during the last hour they traveled only 10. kilometers. What was the group's average speed for the entire trip? km/hr km/hr km/hr km/hr 17. A skier starting from rest skis straight down a slope 50. meters long in 5.0 seconds. What is the magnitude of the acceleration of the skier? m/s m/s m/s m/s An object falls freely from rest near the surface of Earth. What is the speed of the object after having fallen a distance at 4.90 meters? m/s m/s m/s m/s 19. Which two graphs represent the motion of an object on which the net force is zero?
4 Page 4 of A rock falls freely from rest near the surface of a planet where the acceleration due to gravity is 4.0 meters per second 2. What is the speed of this rock after it falls 32 meters? m/s m/s m/s m/s 21. Base your answer on the information and diagram. A car is traveling at a constant speed of 14 meters per second along a straight highway. A tree and a speed limit sign are beside the highway. As it passes the tree, the car starts to accelerate.the car is accelerated uniformly at 2.0 meters per second 2 until it reaches the speed limit sign, 5.0 seconds later. When the car reaches the sign, the car's speed is 1. less than the speed limit 3. equal to the speed limit 2. greater than the speed limit 22. Base your answer on the information and diagram. A car is traveling at a constant speed of 14 meters per second along a straight highway. A tree and a speed limit sign are beside the highway. As it passes the tree, the car starts to accelerate.the car is accelerated uniformly at 2.0 meters per second 2 until it reaches the speed limit sign, 5.0 seconds later. What is the difference between the tree and the sign? m m m m 23. The map shows the route traveled by a school bus. What is the magnitude of the total displacement of the school bus from the start to the end of its trip?
5 Page 5 of m m m 4. 1,800 m 24. Which pair of graphs represent the same motion? 25. A cart moving across a level surface accelerates uniformly at 1.0 meter per second 2 for 2.0 seconds. What additional information is required to determine the distance traveled by the cart during this 2.0- second interval? 1. coefficient of friction between the cart and 3. net force acting on the cart the surface 2. mass of the cart 4. initial velocity of the cart 26. A ball is thrown straight up with a speed of 12 meters per second near the surface of Earth. What is the maximum height reached by the ball? [Neglect air friction.] m m m m 27. A ball starting from rest accelerates uniformly at 5.0 meters per second 2 as it rolls 40. meters down an incline. How much time is required for the ball to roll the 40. meters? s s s s
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